From 278b753663093da385c13e209854f53c792ea96f Mon Sep 17 00:00:00 2001
From: Ted Chambers <tedchamb@microsoft.com>
Date: Wed, 13 Mar 2019 11:45:22 -0400
Subject: [PATCH] Update 5.1 apis to M149

---
 .../azure/devops/v5_1/build/__init__.py       |   1 +
 .../azure/devops/v5_1/build/models.py         |  25 +-
 .../azure/devops/v5_1/cix/__init__.py         |  29 +
 .../azure/devops/v5_1/cix/cix_client.py       | 166 ++++++
 azure-devops/azure/devops/v5_1/cix/models.py  | 502 ++++++++++++++++++
 .../azure/devops/v5_1/client_factory.py       |  28 +-
 .../azure/devops/v5_1/core/core_client.py     |  10 +-
 azure-devops/azure/devops/v5_1/core/models.py |   4 +-
 .../azure/devops/v5_1/feed/__init__.py        |   1 +
 .../azure/devops/v5_1/feed/feed_client.py     |  29 +-
 azure-devops/azure/devops/v5_1/feed/models.py |  32 +-
 .../azure/devops/v5_1/gallery/__init__.py     |   5 +
 .../devops/v5_1/gallery/gallery_client.py     |  23 +
 .../azure/devops/v5_1/gallery/models.py       | 185 +++++++
 .../azure/devops/v5_1/git/git_client_base.py  |  18 +
 azure-devops/azure/devops/v5_1/git/models.py  |  10 +-
 .../azure/devops/v5_1/graph/__init__.py       |   2 +
 .../azure/devops/v5_1/graph/graph_client.py   |  70 +++
 .../azure/devops/v5_1/graph/models.py         |  48 +-
 .../azure/devops/v5_1/identity/models.py      |  10 +-
 .../member_entitlement_management/models.py   |   2 +-
 .../v5_1/notification/notification_client.py  |   2 +-
 azure-devops/azure/devops/v5_1/npm/models.py  |   2 +-
 .../azure/devops/v5_1/nuget/models.py         |   2 +-
 .../azure/devops/v5_1/pipelines/__init__.py   |  16 +
 .../azure/devops/v5_1/pipelines/models.py     |  51 ++
 .../devops/v5_1/pipelines/pipelines_client.py |  50 ++
 .../azure/devops/v5_1/py_pi_api/models.py     |   2 +-
 .../azure/devops/v5_1/release/__init__.py     |   1 +
 .../azure/devops/v5_1/release/models.py       |  45 +-
 .../devops/v5_1/release/release_client.py     |  21 +
 .../devops/v5_1/service_endpoint/models.py    |  64 +--
 .../azure/devops/v5_1/service_hooks/models.py |  16 +-
 .../azure/devops/v5_1/task_agent/__init__.py  |   8 +-
 .../azure/devops/v5_1/task_agent/models.py    | 432 ++++++++-------
 .../v5_1/task_agent/task_agent_client.py      | 366 +++++++++++++
 .../azure/devops/v5_1/test/__init__.py        |   2 +
 azure-devops/azure/devops/v5_1/test/models.py |  76 ++-
 .../azure/devops/v5_1/universal/models.py     |   2 +-
 .../azure/devops/v5_1/work/__init__.py        |   2 +
 azure-devops/azure/devops/v5_1/work/models.py |  90 +++-
 .../azure/devops/v5_1/work/work_client.py     |  44 +-
 .../v5_1/work_item_tracking/__init__.py       |  10 +
 .../devops/v5_1/work_item_tracking/models.py  | 391 +++++++++++++-
 .../work_item_tracking_client.py              | 325 +++++++++++-
 .../v5_1/work_item_tracking_process/models.py |  24 +-
 .../models.py                                 |   6 +-
 ...k_item_tracking_process_template_client.py |  28 +-
 48 files changed, 2886 insertions(+), 392 deletions(-)
 create mode 100644 azure-devops/azure/devops/v5_1/cix/__init__.py
 create mode 100644 azure-devops/azure/devops/v5_1/cix/cix_client.py
 create mode 100644 azure-devops/azure/devops/v5_1/cix/models.py
 create mode 100644 azure-devops/azure/devops/v5_1/pipelines/__init__.py
 create mode 100644 azure-devops/azure/devops/v5_1/pipelines/models.py
 create mode 100644 azure-devops/azure/devops/v5_1/pipelines/pipelines_client.py

diff --git a/azure-devops/azure/devops/v5_1/build/__init__.py b/azure-devops/azure/devops/v5_1/build/__init__.py
index 769eb009..b9cb53c4 100644
--- a/azure-devops/azure/devops/v5_1/build/__init__.py
+++ b/azure-devops/azure/devops/v5_1/build/__init__.py
@@ -11,6 +11,7 @@
 
 __all__ = [
     'AgentPoolQueue',
+    'AgentSpecification',
     'AggregatedResultsAnalysis',
     'AggregatedResultsByOutcome',
     'AggregatedResultsDifference',
diff --git a/azure-devops/azure/devops/v5_1/build/models.py b/azure-devops/azure/devops/v5_1/build/models.py
index 419e5b05..31f30e54 100644
--- a/azure-devops/azure/devops/v5_1/build/models.py
+++ b/azure-devops/azure/devops/v5_1/build/models.py
@@ -41,6 +41,22 @@ def __init__(self, _links=None, id=None, name=None, pool=None, url=None):
         self.url = url
 
 
+class AgentSpecification(Model):
+    """AgentSpecification.
+
+    :param identifier: Agent specification unique identifier.
+    :type identifier: str
+    """
+
+    _attribute_map = {
+        'identifier': {'key': 'identifier', 'type': 'str'}
+    }
+
+    def __init__(self, identifier=None):
+        super(AgentSpecification, self).__init__()
+        self.identifier = identifier
+
+
 class AggregatedResultsAnalysis(Model):
     """AggregatedResultsAnalysis.
 
@@ -318,6 +334,8 @@ class Build(Model):
 
     :param _links:
     :type _links: :class:`ReferenceLinks <azure.devops.v5_1.build.models.ReferenceLinks>`
+    :param agent_specification: The agent specification for the build.
+    :type agent_specification: :class:`AgentSpecification <azure.devops.v5_1.build.models.AgentSpecification>`
     :param build_number: The build number/name of the build.
     :type build_number: str
     :param build_number_revision: The build number revision.
@@ -406,6 +424,7 @@ class Build(Model):
 
     _attribute_map = {
         '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'agent_specification': {'key': 'agentSpecification', 'type': 'AgentSpecification'},
         'build_number': {'key': 'buildNumber', 'type': 'str'},
         'build_number_revision': {'key': 'buildNumberRevision', 'type': 'int'},
         'controller': {'key': 'controller', 'type': 'BuildController'},
@@ -450,9 +469,10 @@ class Build(Model):
         'validation_results': {'key': 'validationResults', 'type': '[BuildRequestValidationResult]'}
     }
 
-    def __init__(self, _links=None, build_number=None, build_number_revision=None, controller=None, definition=None, deleted=None, deleted_by=None, deleted_date=None, deleted_reason=None, demands=None, finish_time=None, id=None, keep_forever=None, last_changed_by=None, last_changed_date=None, logs=None, orchestration_plan=None, parameters=None, plans=None, priority=None, project=None, properties=None, quality=None, queue=None, queue_options=None, queue_position=None, queue_time=None, reason=None, repository=None, requested_by=None, requested_for=None, result=None, retained_by_release=None, source_branch=None, source_version=None, start_time=None, status=None, tags=None, triggered_by_build=None, trigger_info=None, uri=None, url=None, validation_results=None):
+    def __init__(self, _links=None, agent_specification=None, build_number=None, build_number_revision=None, controller=None, definition=None, deleted=None, deleted_by=None, deleted_date=None, deleted_reason=None, demands=None, finish_time=None, id=None, keep_forever=None, last_changed_by=None, last_changed_date=None, logs=None, orchestration_plan=None, parameters=None, plans=None, priority=None, project=None, properties=None, quality=None, queue=None, queue_options=None, queue_position=None, queue_time=None, reason=None, repository=None, requested_by=None, requested_for=None, result=None, retained_by_release=None, source_branch=None, source_version=None, start_time=None, status=None, tags=None, triggered_by_build=None, trigger_info=None, uri=None, url=None, validation_results=None):
         super(Build, self).__init__()
         self._links = _links
+        self.agent_specification = agent_specification
         self.build_number = build_number
         self.build_number_revision = build_number_revision
         self.controller = controller
@@ -1432,7 +1452,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
@@ -2963,6 +2983,7 @@ def __init__(self, created_date=None, id=None, name=None, path=None, project=Non
 
 __all__ = [
     'AgentPoolQueue',
+    'AgentSpecification',
     'AggregatedResultsAnalysis',
     'AggregatedResultsByOutcome',
     'AggregatedResultsDifference',
diff --git a/azure-devops/azure/devops/v5_1/cix/__init__.py b/azure-devops/azure/devops/v5_1/cix/__init__.py
new file mode 100644
index 00000000..bf3d8afc
--- /dev/null
+++ b/azure-devops/azure/devops/v5_1/cix/__init__.py
@@ -0,0 +1,29 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+# Generated file, DO NOT EDIT
+# Changes may cause incorrect behavior and will be lost if the code is regenerated.
+# --------------------------------------------------------------------------------------------
+
+from .models import *
+from .cix_client import CixClient
+
+__all__ = [
+    'ConfigurationFile',
+    'CreatePipelineConnectionInputs',
+    'DetectedBuildFramework',
+    'DetectedBuildTarget',
+    'Operation',
+    'OperationReference',
+    'OperationResultReference',
+    'PipelineConnection',
+    'ReferenceLinks',
+    'TeamProject',
+    'TeamProjectReference',
+    'Template',
+    'TemplateParameterDefinition',
+    'TemplateParameters',
+    'WebApiTeamRef',
+    'CixClient'
+]
diff --git a/azure-devops/azure/devops/v5_1/cix/cix_client.py b/azure-devops/azure/devops/v5_1/cix/cix_client.py
new file mode 100644
index 00000000..dff4428d
--- /dev/null
+++ b/azure-devops/azure/devops/v5_1/cix/cix_client.py
@@ -0,0 +1,166 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+# Generated file, DO NOT EDIT
+# Changes may cause incorrect behavior and will be lost if the code is regenerated.
+# --------------------------------------------------------------------------------------------
+
+from msrest import Serializer, Deserializer
+from ...client import Client
+from . import models
+
+
+class CixClient(Client):
+    """Cix
+    :param str base_url: Service URL
+    :param Authentication creds: Authenticated credentials.
+    """
+
+    def __init__(self, base_url=None, creds=None):
+        super(CixClient, self).__init__(base_url, creds)
+        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
+        self._serialize = Serializer(client_models)
+        self._deserialize = Deserializer(client_models)
+
+    resource_area_identifier = None
+
+    def get_configurations(self, project, repository_type=None, repository_id=None, branch=None, service_connection_id=None):
+        """GetConfigurations.
+        [Preview API] Gets a list of existing configuration files for the given repository.
+        :param str project: Project ID or project name
+        :param str repository_type: The type of the repository such as GitHub, TfsGit (i.e. Azure Repos), Bitbucket, etc.
+        :param str repository_id: The vendor-specific identifier or the name of the repository, e.g. Microsoft/vscode (GitHub) or e9d82045-ddba-4e01-a63d-2ab9f040af62 (Azure Repos)
+        :param str branch: The repository branch where to look for the configuration file.
+        :param str service_connection_id: If specified, the ID of the service endpoint to query. Can only be omitted for providers that do not use service endpoints, e.g. TfsGit (i.e. Azure Repos).
+        :rtype: [ConfigurationFile]
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if repository_type is not None:
+            query_parameters['repositoryType'] = self._serialize.query('repository_type', repository_type, 'str')
+        if repository_id is not None:
+            query_parameters['repositoryId'] = self._serialize.query('repository_id', repository_id, 'str')
+        if branch is not None:
+            query_parameters['branch'] = self._serialize.query('branch', branch, 'str')
+        if service_connection_id is not None:
+            query_parameters['serviceConnectionId'] = self._serialize.query('service_connection_id', service_connection_id, 'str')
+        response = self._send(http_method='GET',
+                              location_id='8fc87684-9ebc-4c37-ab92-f4ac4a58cb3a',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('[ConfigurationFile]', self._unwrap_collection(response))
+
+    def create_connection(self, create_connection_inputs):
+        """CreateConnection.
+        [Preview API] LEGACY METHOD - Obsolete Creates a new team project with the name provided if one does not already exist and then creates a new Pipeline connection within that project. Returns an Operation object that wraps the Job and provides status
+        :param :class:`<CreatePipelineConnectionInputs> <azure.devops.v5_1.cix.models.CreatePipelineConnectionInputs>` create_connection_inputs:
+        :rtype: :class:`<Operation> <azure.devops.v5_1.cix.models.Operation>`
+        """
+        content = self._serialize.body(create_connection_inputs, 'CreatePipelineConnectionInputs')
+        response = self._send(http_method='POST',
+                              location_id='00df4879-9216-45d5-b38d-4a487b626b2c',
+                              version='5.1-preview.1',
+                              content=content)
+        return self._deserialize('Operation', response)
+
+    def create_project_connection(self, create_connection_inputs, project):
+        """CreateProjectConnection.
+        [Preview API] Creates a new team project with the name provided if one does not already exist and then creates a new Pipeline connection within that project. Returns an Operation object that wraps the Job and provides status
+        :param :class:`<CreatePipelineConnectionInputs> <azure.devops.v5_1.cix.models.CreatePipelineConnectionInputs>` create_connection_inputs:
+        :param str project:
+        :rtype: :class:`<PipelineConnection> <azure.devops.v5_1.cix.models.PipelineConnection>`
+        """
+        query_parameters = {}
+        if project is not None:
+            query_parameters['project'] = self._serialize.query('project', project, 'str')
+        content = self._serialize.body(create_connection_inputs, 'CreatePipelineConnectionInputs')
+        response = self._send(http_method='POST',
+                              location_id='00df4879-9216-45d5-b38d-4a487b626b2c',
+                              version='5.1-preview.1',
+                              query_parameters=query_parameters,
+                              content=content)
+        return self._deserialize('PipelineConnection', response)
+
+    def get_detected_build_frameworks(self, project, repository_type=None, repository_id=None, branch=None, detection_type=None, service_connection_id=None):
+        """GetDetectedBuildFrameworks.
+        [Preview API] Returns a list of build frameworks that best match the given repository based on its contents.
+        :param str project: Project ID or project name
+        :param str repository_type: The type of the repository such as GitHub, TfsGit (i.e. Azure Repos), Bitbucket, etc.
+        :param str repository_id: The vendor-specific identifier or the name of the repository, e.g. Microsoft/vscode (GitHub) or e9d82045-ddba-4e01-a63d-2ab9f040af62 (Azure Repos)
+        :param str branch: The repository branch to detect build frameworks for.
+        :param str detection_type:
+        :param str service_connection_id: If specified, the ID of the service endpoint to query. Can only be omitted for providers that do not use service endpoints, e.g. TfsGit (i.e. Azure Repos).
+        :rtype: [DetectedBuildFramework]
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if repository_type is not None:
+            query_parameters['repositoryType'] = self._serialize.query('repository_type', repository_type, 'str')
+        if repository_id is not None:
+            query_parameters['repositoryId'] = self._serialize.query('repository_id', repository_id, 'str')
+        if branch is not None:
+            query_parameters['branch'] = self._serialize.query('branch', branch, 'str')
+        if detection_type is not None:
+            query_parameters['detectionType'] = self._serialize.query('detection_type', detection_type, 'str')
+        if service_connection_id is not None:
+            query_parameters['serviceConnectionId'] = self._serialize.query('service_connection_id', service_connection_id, 'str')
+        response = self._send(http_method='GET',
+                              location_id='29a30bab-9efb-4652-bf1b-9269baca0980',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('[DetectedBuildFramework]', self._unwrap_collection(response))
+
+    def get_template_recommendations(self, project, repository_type=None, repository_id=None, branch=None, service_connection_id=None):
+        """GetTemplateRecommendations.
+        [Preview API] Returns a list of all YAML templates with weighting based on which would best fit the given repository.
+        :param str project: Project ID or project name
+        :param str repository_type: The type of the repository such as GitHub, TfsGit (i.e. Azure Repos), Bitbucket, etc.
+        :param str repository_id: The vendor-specific identifier or the name of the repository, e.g. Microsoft/vscode (GitHub) or e9d82045-ddba-4e01-a63d-2ab9f040af62 (Azure Repos)
+        :param str branch: The repository branch which to find matching templates for.
+        :param str service_connection_id: If specified, the ID of the service endpoint to query. Can only be omitted for providers that do not use service endpoints, e.g. TfsGit (i.e. Azure Repos).
+        :rtype: [Template]
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if repository_type is not None:
+            query_parameters['repositoryType'] = self._serialize.query('repository_type', repository_type, 'str')
+        if repository_id is not None:
+            query_parameters['repositoryId'] = self._serialize.query('repository_id', repository_id, 'str')
+        if branch is not None:
+            query_parameters['branch'] = self._serialize.query('branch', branch, 'str')
+        if service_connection_id is not None:
+            query_parameters['serviceConnectionId'] = self._serialize.query('service_connection_id', service_connection_id, 'str')
+        response = self._send(http_method='GET',
+                              location_id='63ea8f13-b563-4be7-bc31-3a96eda27220',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('[Template]', self._unwrap_collection(response))
+
+    def render_template(self, template_parameters, template_id):
+        """RenderTemplate.
+        [Preview API]
+        :param :class:`<TemplateParameters> <azure.devops.v5_1.cix.models.TemplateParameters>` template_parameters:
+        :param str template_id:
+        :rtype: :class:`<Template> <azure.devops.v5_1.cix.models.Template>`
+        """
+        route_values = {}
+        if template_id is not None:
+            route_values['templateId'] = self._serialize.url('template_id', template_id, 'str')
+        content = self._serialize.body(template_parameters, 'TemplateParameters')
+        response = self._send(http_method='POST',
+                              location_id='eb5d6d1d-98a2-4bbd-9028-f9a6b2d66515',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              content=content)
+        return self._deserialize('Template', response)
+
diff --git a/azure-devops/azure/devops/v5_1/cix/models.py b/azure-devops/azure/devops/v5_1/cix/models.py
new file mode 100644
index 00000000..c1f0273c
--- /dev/null
+++ b/azure-devops/azure/devops/v5_1/cix/models.py
@@ -0,0 +1,502 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+# Generated file, DO NOT EDIT
+# Changes may cause incorrect behavior and will be lost if the code is regenerated.
+# --------------------------------------------------------------------------------------------
+
+from msrest.serialization import Model
+
+
+class ConfigurationFile(Model):
+    """ConfigurationFile.
+
+    :param content: The content of the file.
+    :type content: str
+    :param is_base64_encoded: Indicates if the content is base64 encoded.
+    :type is_base64_encoded: bool
+    :param path: The full path of the file, relative to the root of the repository.
+    :type path: str
+    """
+
+    _attribute_map = {
+        'content': {'key': 'content', 'type': 'str'},
+        'is_base64_encoded': {'key': 'isBase64Encoded', 'type': 'bool'},
+        'path': {'key': 'path', 'type': 'str'}
+    }
+
+    def __init__(self, content=None, is_base64_encoded=None, path=None):
+        super(ConfigurationFile, self).__init__()
+        self.content = content
+        self.is_base64_encoded = is_base64_encoded
+        self.path = path
+
+
+class CreatePipelineConnectionInputs(Model):
+    """CreatePipelineConnectionInputs.
+
+    :param configuration_file_path: The path to the VSTS YAML file in the repository. (use only forward slashes as path separators)
+    :type configuration_file_path: str
+    :param create_build_definition: Use true to create a build definition for this connection. Requires repository information be supplied.
+    :type create_build_definition: bool
+    :param project: The team project settings for an existing team project or for a new team project.
+    :type project: :class:`TeamProject <azure.devops.v5_1.pipelines.models.TeamProject>`
+    :param provider_data: This dictionary contains information that is specific to the provider. This data is opaque to the rest of the Pipelines infrastructure and does NOT contribute to the resources Token. The format of the string and its contents depend on the implementation of the provider.
+    :type provider_data: dict
+    :param provider_id: The external source provider id for which the connection is being made.
+    :type provider_id: str
+    :param redirect_url: If provided, this will be the URL returned with the PipelineConnection. This will override any other redirect URL that would have been generated for the connection.
+    :type redirect_url: str
+    :param repository_id: The repository id for which the connection is being made. This may be the same as the name.
+    :type repository_id: str
+    :param repository_name: The repository name for which the connection is being made.
+    :type repository_name: str
+    :param request_source: Where the request to create the pipeline originated (such as 'GitHub Marketplace' or 'Azure DevOps')
+    :type request_source: str
+    :param routing_method: The method used to identify the target hostd.
+    :type routing_method: object
+    :param target_branch: The target branch for which the connection is being made.
+    :type target_branch: str
+    """
+
+    _attribute_map = {
+        'configuration_file_path': {'key': 'configurationFilePath', 'type': 'str'},
+        'create_build_definition': {'key': 'createBuildDefinition', 'type': 'bool'},
+        'project': {'key': 'project', 'type': 'TeamProject'},
+        'provider_data': {'key': 'providerData', 'type': '{str}'},
+        'provider_id': {'key': 'providerId', 'type': 'str'},
+        'redirect_url': {'key': 'redirectUrl', 'type': 'str'},
+        'repository_id': {'key': 'repositoryId', 'type': 'str'},
+        'repository_name': {'key': 'repositoryName', 'type': 'str'},
+        'request_source': {'key': 'requestSource', 'type': 'str'},
+        'routing_method': {'key': 'routingMethod', 'type': 'object'},
+        'target_branch': {'key': 'targetBranch', 'type': 'str'}
+    }
+
+    def __init__(self, configuration_file_path=None, create_build_definition=None, project=None, provider_data=None, provider_id=None, redirect_url=None, repository_id=None, repository_name=None, request_source=None, routing_method=None, target_branch=None):
+        super(CreatePipelineConnectionInputs, self).__init__()
+        self.configuration_file_path = configuration_file_path
+        self.create_build_definition = create_build_definition
+        self.project = project
+        self.provider_data = provider_data
+        self.provider_id = provider_id
+        self.redirect_url = redirect_url
+        self.repository_id = repository_id
+        self.repository_name = repository_name
+        self.request_source = request_source
+        self.routing_method = routing_method
+        self.target_branch = target_branch
+
+
+class DetectedBuildFramework(Model):
+    """DetectedBuildFramework.
+
+    :param build_targets: List of build targets discovered for the framework to act upon.
+    :type build_targets: list of :class:`DetectedBuildTarget <azure.devops.v5_1.pipelines.models.DetectedBuildTarget>`
+    :param id: The unique identifier of the build framework.
+    :type id: str
+    :param settings: Additional detected settings for the build framework.
+    :type settings: dict
+    :param version: The version of the framework if it can be determined from the sources.
+    :type version: str
+    """
+
+    _attribute_map = {
+        'build_targets': {'key': 'buildTargets', 'type': '[DetectedBuildTarget]'},
+        'id': {'key': 'id', 'type': 'str'},
+        'settings': {'key': 'settings', 'type': '{str}'},
+        'version': {'key': 'version', 'type': 'str'}
+    }
+
+    def __init__(self, build_targets=None, id=None, settings=None, version=None):
+        super(DetectedBuildFramework, self).__init__()
+        self.build_targets = build_targets
+        self.id = id
+        self.settings = settings
+        self.version = version
+
+
+class DetectedBuildTarget(Model):
+    """DetectedBuildTarget.
+
+    :param path:
+    :type path: str
+    :param settings:
+    :type settings: dict
+    :param type:
+    :type type: str
+    """
+
+    _attribute_map = {
+        'path': {'key': 'path', 'type': 'str'},
+        'settings': {'key': 'settings', 'type': '{str}'},
+        'type': {'key': 'type', 'type': 'str'}
+    }
+
+    def __init__(self, path=None, settings=None, type=None):
+        super(DetectedBuildTarget, self).__init__()
+        self.path = path
+        self.settings = settings
+        self.type = type
+
+
+class OperationReference(Model):
+    """OperationReference.
+
+    :param id: Unique identifier for the operation.
+    :type id: str
+    :param plugin_id: Unique identifier for the plugin.
+    :type plugin_id: str
+    :param status: The current status of the operation.
+    :type status: object
+    :param url: URL to get the full operation object.
+    :type url: str
+    """
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'plugin_id': {'key': 'pluginId', 'type': 'str'},
+        'status': {'key': 'status', 'type': 'object'},
+        'url': {'key': 'url', 'type': 'str'}
+    }
+
+    def __init__(self, id=None, plugin_id=None, status=None, url=None):
+        super(OperationReference, self).__init__()
+        self.id = id
+        self.plugin_id = plugin_id
+        self.status = status
+        self.url = url
+
+
+class OperationResultReference(Model):
+    """OperationResultReference.
+
+    :param result_url: URL to the operation result.
+    :type result_url: str
+    """
+
+    _attribute_map = {
+        'result_url': {'key': 'resultUrl', 'type': 'str'}
+    }
+
+    def __init__(self, result_url=None):
+        super(OperationResultReference, self).__init__()
+        self.result_url = result_url
+
+
+class PipelineConnection(Model):
+    """PipelineConnection.
+
+    :param account_id: The account id that contains the team project for the connection.
+    :type account_id: str
+    :param definition_id: The definition id that was created for the connection.
+    :type definition_id: int
+    :param redirect_url: This is the URL that the user should be taken to in order to continue setup.
+    :type redirect_url: str
+    :param service_endpoint_id: The service endpoint that was created for the connection.
+    :type service_endpoint_id: str
+    :param team_project_id: The team project that contains the definition for the connection.
+    :type team_project_id: str
+    """
+
+    _attribute_map = {
+        'account_id': {'key': 'accountId', 'type': 'str'},
+        'definition_id': {'key': 'definitionId', 'type': 'int'},
+        'redirect_url': {'key': 'redirectUrl', 'type': 'str'},
+        'service_endpoint_id': {'key': 'serviceEndpointId', 'type': 'str'},
+        'team_project_id': {'key': 'teamProjectId', 'type': 'str'}
+    }
+
+    def __init__(self, account_id=None, definition_id=None, redirect_url=None, service_endpoint_id=None, team_project_id=None):
+        super(PipelineConnection, self).__init__()
+        self.account_id = account_id
+        self.definition_id = definition_id
+        self.redirect_url = redirect_url
+        self.service_endpoint_id = service_endpoint_id
+        self.team_project_id = team_project_id
+
+
+class ReferenceLinks(Model):
+    """ReferenceLinks.
+
+    :param links: The readonly view of the links.  Because Reference links are readonly, we only want to expose them as read only.
+    :type links: dict
+    """
+
+    _attribute_map = {
+        'links': {'key': 'links', 'type': '{object}'}
+    }
+
+    def __init__(self, links=None):
+        super(ReferenceLinks, self).__init__()
+        self.links = links
+
+
+class TeamProjectReference(Model):
+    """TeamProjectReference.
+
+    :param abbreviation: Project abbreviation.
+    :type abbreviation: str
+    :param default_team_image_url: Url to default team identity image.
+    :type default_team_image_url: str
+    :param description: The project's description (if any).
+    :type description: str
+    :param id: Project identifier.
+    :type id: str
+    :param last_update_time: Project last update time.
+    :type last_update_time: datetime
+    :param name: Project name.
+    :type name: str
+    :param revision: Project revision.
+    :type revision: long
+    :param state: Project state.
+    :type state: object
+    :param url: Url to the full version of the object.
+    :type url: str
+    :param visibility: Project visibility.
+    :type visibility: object
+    """
+
+    _attribute_map = {
+        'abbreviation': {'key': 'abbreviation', 'type': 'str'},
+        'default_team_image_url': {'key': 'defaultTeamImageUrl', 'type': 'str'},
+        'description': {'key': 'description', 'type': 'str'},
+        'id': {'key': 'id', 'type': 'str'},
+        'last_update_time': {'key': 'lastUpdateTime', 'type': 'iso-8601'},
+        'name': {'key': 'name', 'type': 'str'},
+        'revision': {'key': 'revision', 'type': 'long'},
+        'state': {'key': 'state', 'type': 'object'},
+        'url': {'key': 'url', 'type': 'str'},
+        'visibility': {'key': 'visibility', 'type': 'object'}
+    }
+
+    def __init__(self, abbreviation=None, default_team_image_url=None, description=None, id=None, last_update_time=None, name=None, revision=None, state=None, url=None, visibility=None):
+        super(TeamProjectReference, self).__init__()
+        self.abbreviation = abbreviation
+        self.default_team_image_url = default_team_image_url
+        self.description = description
+        self.id = id
+        self.last_update_time = last_update_time
+        self.name = name
+        self.revision = revision
+        self.state = state
+        self.url = url
+        self.visibility = visibility
+
+
+class Template(Model):
+    """Template.
+
+    :param content:
+    :type content: str
+    :param description:
+    :type description: str
+    :param icon_url:
+    :type icon_url: str
+    :param id:
+    :type id: str
+    :param name:
+    :type name: str
+    :param parameters:
+    :type parameters: list of :class:`TemplateParameterDefinition <azure.devops.v5_1.pipelines.models.TemplateParameterDefinition>`
+    :param recommended_weight:
+    :type recommended_weight: int
+    """
+
+    _attribute_map = {
+        'content': {'key': 'content', 'type': 'str'},
+        'description': {'key': 'description', 'type': 'str'},
+        'icon_url': {'key': 'iconUrl', 'type': 'str'},
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'parameters': {'key': 'parameters', 'type': '[TemplateParameterDefinition]'},
+        'recommended_weight': {'key': 'recommendedWeight', 'type': 'int'}
+    }
+
+    def __init__(self, content=None, description=None, icon_url=None, id=None, name=None, parameters=None, recommended_weight=None):
+        super(Template, self).__init__()
+        self.content = content
+        self.description = description
+        self.icon_url = icon_url
+        self.id = id
+        self.name = name
+        self.parameters = parameters
+        self.recommended_weight = recommended_weight
+
+
+class TemplateParameterDefinition(Model):
+    """TemplateParameterDefinition.
+
+    :param name:
+    :type name: str
+    :param required:
+    :type required: bool
+    :param type:
+    :type type: str
+    """
+
+    _attribute_map = {
+        'name': {'key': 'name', 'type': 'str'},
+        'required': {'key': 'required', 'type': 'bool'},
+        'type': {'key': 'type', 'type': 'str'}
+    }
+
+    def __init__(self, name=None, required=None, type=None):
+        super(TemplateParameterDefinition, self).__init__()
+        self.name = name
+        self.required = required
+        self.type = type
+
+
+class TemplateParameters(Model):
+    """TemplateParameters.
+
+    :param tokens:
+    :type tokens: dict
+    """
+
+    _attribute_map = {
+        'tokens': {'key': 'tokens', 'type': '{str}'}
+    }
+
+    def __init__(self, tokens=None):
+        super(TemplateParameters, self).__init__()
+        self.tokens = tokens
+
+
+class WebApiTeamRef(Model):
+    """WebApiTeamRef.
+
+    :param id: Team (Identity) Guid. A Team Foundation ID.
+    :type id: str
+    :param name: Team name
+    :type name: str
+    :param url: Team REST API Url
+    :type url: str
+    """
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'url': {'key': 'url', 'type': 'str'}
+    }
+
+    def __init__(self, id=None, name=None, url=None):
+        super(WebApiTeamRef, self).__init__()
+        self.id = id
+        self.name = name
+        self.url = url
+
+
+class Operation(OperationReference):
+    """Operation.
+
+    :param id: Unique identifier for the operation.
+    :type id: str
+    :param plugin_id: Unique identifier for the plugin.
+    :type plugin_id: str
+    :param status: The current status of the operation.
+    :type status: object
+    :param url: URL to get the full operation object.
+    :type url: str
+    :param _links: Links to other related objects.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.microsoft._visual_studio._services._web_api.models.ReferenceLinks>`
+    :param detailed_message: Detailed messaged about the status of an operation.
+    :type detailed_message: str
+    :param result_message: Result message for an operation.
+    :type result_message: str
+    :param result_url: URL to the operation result.
+    :type result_url: :class:`OperationResultReference <azure.devops.v5_1.microsoft._visual_studio._services._web_api.models.OperationResultReference>`
+    """
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'plugin_id': {'key': 'pluginId', 'type': 'str'},
+        'status': {'key': 'status', 'type': 'object'},
+        'url': {'key': 'url', 'type': 'str'},
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'detailed_message': {'key': 'detailedMessage', 'type': 'str'},
+        'result_message': {'key': 'resultMessage', 'type': 'str'},
+        'result_url': {'key': 'resultUrl', 'type': 'OperationResultReference'}
+    }
+
+    def __init__(self, id=None, plugin_id=None, status=None, url=None, _links=None, detailed_message=None, result_message=None, result_url=None):
+        super(Operation, self).__init__(id=id, plugin_id=plugin_id, status=status, url=url)
+        self._links = _links
+        self.detailed_message = detailed_message
+        self.result_message = result_message
+        self.result_url = result_url
+
+
+class TeamProject(TeamProjectReference):
+    """TeamProject.
+
+    :param abbreviation: Project abbreviation.
+    :type abbreviation: str
+    :param default_team_image_url: Url to default team identity image.
+    :type default_team_image_url: str
+    :param description: The project's description (if any).
+    :type description: str
+    :param id: Project identifier.
+    :type id: str
+    :param last_update_time: Project last update time.
+    :type last_update_time: datetime
+    :param name: Project name.
+    :type name: str
+    :param revision: Project revision.
+    :type revision: long
+    :param state: Project state.
+    :type state: object
+    :param url: Url to the full version of the object.
+    :type url: str
+    :param visibility: Project visibility.
+    :type visibility: object
+    :param _links: The links to other objects related to this object.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.microsoft._team_foundation._core._web_api.models.ReferenceLinks>`
+    :param capabilities: Set of capabilities this project has (such as process template & version control).
+    :type capabilities: dict
+    :param default_team: The shallow ref to the default team.
+    :type default_team: :class:`WebApiTeamRef <azure.devops.v5_1.microsoft._team_foundation._core._web_api.models.WebApiTeamRef>`
+    """
+
+    _attribute_map = {
+        'abbreviation': {'key': 'abbreviation', 'type': 'str'},
+        'default_team_image_url': {'key': 'defaultTeamImageUrl', 'type': 'str'},
+        'description': {'key': 'description', 'type': 'str'},
+        'id': {'key': 'id', 'type': 'str'},
+        'last_update_time': {'key': 'lastUpdateTime', 'type': 'iso-8601'},
+        'name': {'key': 'name', 'type': 'str'},
+        'revision': {'key': 'revision', 'type': 'long'},
+        'state': {'key': 'state', 'type': 'object'},
+        'url': {'key': 'url', 'type': 'str'},
+        'visibility': {'key': 'visibility', 'type': 'object'},
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'capabilities': {'key': 'capabilities', 'type': '{{str}}'},
+        'default_team': {'key': 'defaultTeam', 'type': 'WebApiTeamRef'}
+    }
+
+    def __init__(self, abbreviation=None, default_team_image_url=None, description=None, id=None, last_update_time=None, name=None, revision=None, state=None, url=None, visibility=None, _links=None, capabilities=None, default_team=None):
+        super(TeamProject, self).__init__(abbreviation=abbreviation, default_team_image_url=default_team_image_url, description=description, id=id, last_update_time=last_update_time, name=name, revision=revision, state=state, url=url, visibility=visibility)
+        self._links = _links
+        self.capabilities = capabilities
+        self.default_team = default_team
+
+
+__all__ = [
+    'ConfigurationFile',
+    'CreatePipelineConnectionInputs',
+    'DetectedBuildFramework',
+    'DetectedBuildTarget',
+    'OperationReference',
+    'OperationResultReference',
+    'PipelineConnection',
+    'ReferenceLinks',
+    'TeamProjectReference',
+    'Template',
+    'TemplateParameterDefinition',
+    'TemplateParameters',
+    'WebApiTeamRef',
+    'Operation',
+    'TeamProject',
+]
diff --git a/azure-devops/azure/devops/v5_1/client_factory.py b/azure-devops/azure/devops/v5_1/client_factory.py
index a00af82c..bc5110e7 100644
--- a/azure-devops/azure/devops/v5_1/client_factory.py
+++ b/azure-devops/azure/devops/v5_1/client_factory.py
@@ -29,6 +29,13 @@ def get_build_client(self):
         """
         return self._connection.get_client('azure.devops.v5_1.build.build_client.BuildClient')
 
+    def get_cix_client(self):
+        """get_cix_client.
+        Gets the 5.1 version of the CixClient
+        :rtype: :class:`<CixClient> <azure.devops.v5_1.cix.cix_client.CixClient>`
+        """
+        return self._connection.get_client('azure.devops.v5_1.cix.cix_client.CixClient')
+
     def get_client_trace_client(self):
         """get_client_trace_client.
         Gets the 5.1 version of the ClientTraceClient
@@ -141,13 +148,6 @@ def get_identity_client(self):
         """
         return self._connection.get_client('azure.devops.v5_1.identity.identity_client.IdentityClient')
 
-    def get_licensing_client(self):
-        """get_licensing_client.
-        Gets the 5.1 version of the LicensingClient
-        :rtype: :class:`<LicensingClient> <azure.devops.v5_1.licensing.licensing_client.LicensingClient>`
-        """
-        return self._connection.get_client('azure.devops.v5_1.licensing.licensing_client.LicensingClient')
-
     def get_location_client(self):
         """get_location_client.
         Gets the 5.1 version of the LocationClient
@@ -197,6 +197,13 @@ def get_operations_client(self):
         """
         return self._connection.get_client('azure.devops.v5_1.operations.operations_client.OperationsClient')
 
+    def get_pipelines_client(self):
+        """get_pipelines_client.
+        Gets the 5.1 version of the PipelinesClient
+        :rtype: :class:`<PipelinesClient> <azure.devops.v5_1.pipelines.pipelines_client.PipelinesClient>`
+        """
+        return self._connection.get_client('azure.devops.v5_1.pipelines.pipelines_client.PipelinesClient')
+
     def get_policy_client(self):
         """get_policy_client.
         Gets the 5.1 version of the PolicyClient
@@ -344,13 +351,6 @@ def get_work_item_tracking_client(self):
         """
         return self._connection.get_client('azure.devops.v5_1.work_item_tracking.work_item_tracking_client.WorkItemTrackingClient')
 
-    def get_work_item_tracking_comments_client(self):
-        """get_work_item_tracking_comments_client.
-        Gets the 5.1 version of the WorkItemTrackingCommentsClient
-        :rtype: :class:`<WorkItemTrackingCommentsClient> <azure.devops.v5_1.work_item_tracking_comments.work_item_tracking_comments_client.WorkItemTrackingCommentsClient>`
-        """
-        return self._connection.get_client('azure.devops.v5_1.work_item_tracking_comments.work_item_tracking_comments_client.WorkItemTrackingCommentsClient')
-
     def get_work_item_tracking_process_client(self):
         """get_work_item_tracking_process_client.
         Gets the 5.1 version of the WorkItemTrackingProcessClient
diff --git a/azure-devops/azure/devops/v5_1/core/core_client.py b/azure-devops/azure/devops/v5_1/core/core_client.py
index 14e1cd54..d77fb27e 100644
--- a/azure-devops/azure/devops/v5_1/core/core_client.py
+++ b/azure-devops/azure/devops/v5_1/core/core_client.py
@@ -27,8 +27,8 @@ def __init__(self, base_url=None, creds=None):
 
     def remove_project_avatar(self, project_id):
         """RemoveProjectAvatar.
-        [Preview API] Removes the avatar for the project
-        :param str project_id: The id or name of the project
+        [Preview API] Removes the avatar for the project.
+        :param str project_id: The ID or name of the project.
         """
         route_values = {}
         if project_id is not None:
@@ -40,9 +40,9 @@ def remove_project_avatar(self, project_id):
 
     def set_project_avatar(self, avatar_blob, project_id):
         """SetProjectAvatar.
-        [Preview API] Upload avatar for the project
-        :param :class:`<ProjectAvatar> <azure.devops.v5_1.core.models.ProjectAvatar>` avatar_blob:
-        :param str project_id: The id or name of the project
+        [Preview API] Sets the avatar for the project.
+        :param :class:`<ProjectAvatar> <azure.devops.v5_1.core.models.ProjectAvatar>` avatar_blob: The avatar blob data object to upload.
+        :param str project_id: The ID or name of the project.
         """
         route_values = {}
         if project_id is not None:
diff --git a/azure-devops/azure/devops/v5_1/core/models.py b/azure-devops/azure/devops/v5_1/core/models.py
index 63ade857..0868d952 100644
--- a/azure-devops/azure/devops/v5_1/core/models.py
+++ b/azure-devops/azure/devops/v5_1/core/models.py
@@ -120,7 +120,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
@@ -192,7 +192,7 @@ def __init__(self, name=None, url=None):
 class ProjectAvatar(Model):
     """ProjectAvatar.
 
-    :param image: The avatar image represented as a byte array
+    :param image: The avatar image represented as a byte array.
     :type image: str
     """
 
diff --git a/azure-devops/azure/devops/v5_1/feed/__init__.py b/azure-devops/azure/devops/v5_1/feed/__init__.py
index 32d89778..d53510e0 100644
--- a/azure-devops/azure/devops/v5_1/feed/__init__.py
+++ b/azure-devops/azure/devops/v5_1/feed/__init__.py
@@ -35,6 +35,7 @@
     'PackageVersionMetrics',
     'PackageVersionMetricsQuery',
     'PackageVersionProvenance',
+    'ProjectReference',
     'ProtocolMetadata',
     'Provenance',
     'RecycleBinPackageVersion',
diff --git a/azure-devops/azure/devops/v5_1/feed/feed_client.py b/azure-devops/azure/devops/v5_1/feed/feed_client.py
index 9cb0a600..b44a0c4e 100644
--- a/azure-devops/azure/devops/v5_1/feed/feed_client.py
+++ b/azure-devops/azure/devops/v5_1/feed/feed_client.py
@@ -79,25 +79,33 @@ def get_feed_changes(self, include_deleted=None, continuation_token=None, batch_
                               query_parameters=query_parameters)
         return self._deserialize('FeedChangesResponse', response)
 
-    def create_feed(self, feed):
+    def create_feed(self, feed, project=None):
         """CreateFeed.
         [Preview API] Create a feed, a container for various package types.
         :param :class:`<Feed> <azure.devops.v5_1.feed.models.Feed>` feed: A JSON object containing both required and optional attributes for the feed. Name is the only required value.
+        :param str project: Project ID or project name
         :rtype: :class:`<Feed> <azure.devops.v5_1.feed.models.Feed>`
         """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
         content = self._serialize.body(feed, 'Feed')
         response = self._send(http_method='POST',
                               location_id='c65009a7-474a-4ad1-8b42-7d852107ef8c',
                               version='5.1-preview.1',
+                              route_values=route_values,
                               content=content)
         return self._deserialize('Feed', response)
 
-    def delete_feed(self, feed_id):
+    def delete_feed(self, feed_id, project=None):
         """DeleteFeed.
         [Preview API] Remove a feed and all its packages.  The action does not result in packages moving to the RecycleBin and is not reversible.
         :param str feed_id: Name or Id of the feed.
+        :param str project: Project ID or project name
         """
         route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
         if feed_id is not None:
             route_values['feedId'] = self._serialize.url('feed_id', feed_id, 'str')
         self._send(http_method='DELETE',
@@ -105,14 +113,17 @@ def delete_feed(self, feed_id):
                    version='5.1-preview.1',
                    route_values=route_values)
 
-    def get_feed(self, feed_id, include_deleted_upstreams=None):
+    def get_feed(self, feed_id, project=None, include_deleted_upstreams=None):
         """GetFeed.
         [Preview API] Get the settings for a specific feed.
         :param str feed_id: Name or Id of the feed.
+        :param str project: Project ID or project name
         :param bool include_deleted_upstreams: Include upstreams that have been deleted in the response.
         :rtype: :class:`<Feed> <azure.devops.v5_1.feed.models.Feed>`
         """
         route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
         if feed_id is not None:
             route_values['feedId'] = self._serialize.url('feed_id', feed_id, 'str')
         query_parameters = {}
@@ -125,13 +136,17 @@ def get_feed(self, feed_id, include_deleted_upstreams=None):
                               query_parameters=query_parameters)
         return self._deserialize('Feed', response)
 
-    def get_feeds(self, feed_role=None, include_deleted_upstreams=None):
+    def get_feeds(self, project=None, feed_role=None, include_deleted_upstreams=None):
         """GetFeeds.
         [Preview API] Get all feeds in an account where you have the provided role access.
+        :param str project: Project ID or project name
         :param str feed_role: Filter by this role, either Administrator(4), Contributor(3), or Reader(2) level permissions.
         :param bool include_deleted_upstreams: Include upstreams that have been deleted in the response.
         :rtype: [Feed]
         """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
         query_parameters = {}
         if feed_role is not None:
             query_parameters['feedRole'] = self._serialize.query('feed_role', feed_role, 'str')
@@ -140,17 +155,21 @@ def get_feeds(self, feed_role=None, include_deleted_upstreams=None):
         response = self._send(http_method='GET',
                               location_id='c65009a7-474a-4ad1-8b42-7d852107ef8c',
                               version='5.1-preview.1',
+                              route_values=route_values,
                               query_parameters=query_parameters)
         return self._deserialize('[Feed]', self._unwrap_collection(response))
 
-    def update_feed(self, feed, feed_id):
+    def update_feed(self, feed, feed_id, project=None):
         """UpdateFeed.
         [Preview API] Change the attributes of a feed.
         :param :class:`<FeedUpdate> <azure.devops.v5_1.feed.models.FeedUpdate>` feed: A JSON object containing the feed settings to be updated.
         :param str feed_id: Name or Id of the feed.
+        :param str project: Project ID or project name
         :rtype: :class:`<Feed> <azure.devops.v5_1.feed.models.Feed>`
         """
         route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
         if feed_id is not None:
             route_values['feedId'] = self._serialize.url('feed_id', feed_id, 'str')
         content = self._serialize.body(feed, 'FeedUpdate')
diff --git a/azure-devops/azure/devops/v5_1/feed/models.py b/azure-devops/azure/devops/v5_1/feed/models.py
index 96668519..ec6e3b16 100644
--- a/azure-devops/azure/devops/v5_1/feed/models.py
+++ b/azure-devops/azure/devops/v5_1/feed/models.py
@@ -114,6 +114,8 @@ class FeedCore(Model):
     :type is_read_only: bool
     :param name: A name for the feed. feed names must follow these rules: <list type="bullet"><item><description> Must not exceed 64 characters </description></item><item><description> Must not contain whitespaces </description></item><item><description> Must not start with an underscore or a period </description></item><item><description> Must not end with a period </description></item><item><description> Must not contain any of the following illegal characters: <![CDATA[ @, ~, ;, {, }, \, +, =, <, >, |, /, \\, ?, :, &, $, *, \", #, [, ] ]]></description></item></list>
     :type name: str
+    :param project: The project that this feed is associated with.
+    :type project: :class:`ProjectReference <azure.devops.v5_1.packaging.models.ProjectReference>`
     :param upstream_enabled: OBSOLETE: This should always be true.  Setting to false will override all sources in UpstreamSources.
     :type upstream_enabled: bool
     :param upstream_sources: A list of sources that this feed will fetch packages from.  An empty list indicates that this feed will not search any additional sources for packages.
@@ -134,6 +136,7 @@ class FeedCore(Model):
         'id': {'key': 'id', 'type': 'str'},
         'is_read_only': {'key': 'isReadOnly', 'type': 'bool'},
         'name': {'key': 'name', 'type': 'str'},
+        'project': {'key': 'project', 'type': 'ProjectReference'},
         'upstream_enabled': {'key': 'upstreamEnabled', 'type': 'bool'},
         'upstream_sources': {'key': 'upstreamSources', 'type': '[UpstreamSource]'},
         'view': {'key': 'view', 'type': 'FeedView'},
@@ -141,7 +144,7 @@ class FeedCore(Model):
         'view_name': {'key': 'viewName', 'type': 'str'}
     }
 
-    def __init__(self, allow_upstream_name_conflict=None, capabilities=None, fully_qualified_id=None, fully_qualified_name=None, id=None, is_read_only=None, name=None, upstream_enabled=None, upstream_sources=None, view=None, view_id=None, view_name=None):
+    def __init__(self, allow_upstream_name_conflict=None, capabilities=None, fully_qualified_id=None, fully_qualified_name=None, id=None, is_read_only=None, name=None, project=None, upstream_enabled=None, upstream_sources=None, view=None, view_id=None, view_name=None):
         super(FeedCore, self).__init__()
         self.allow_upstream_name_conflict = allow_upstream_name_conflict
         self.capabilities = capabilities
@@ -150,6 +153,7 @@ def __init__(self, allow_upstream_name_conflict=None, capabilities=None, fully_q
         self.id = id
         self.is_read_only = is_read_only
         self.name = name
+        self.project = project
         self.upstream_enabled = upstream_enabled
         self.upstream_sources = upstream_sources
         self.view = view
@@ -320,7 +324,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
@@ -785,6 +789,22 @@ def __init__(self, feed_id=None, package_id=None, package_version_id=None, prove
         self.provenance = provenance
 
 
+class ProjectReference(Model):
+    """ProjectReference.
+
+    :param id: Gets or sets id of the project.
+    :type id: str
+    """
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'}
+    }
+
+    def __init__(self, id=None):
+        super(ProjectReference, self).__init__()
+        self.id = id
+
+
 class ProtocolMetadata(Model):
     """ProtocolMetadata.
 
@@ -1002,6 +1022,8 @@ class Feed(FeedCore):
     :type is_read_only: bool
     :param name: A name for the feed. feed names must follow these rules: <list type="bullet"><item><description> Must not exceed 64 characters </description></item><item><description> Must not contain whitespaces </description></item><item><description> Must not start with an underscore or a period </description></item><item><description> Must not end with a period </description></item><item><description> Must not contain any of the following illegal characters: <![CDATA[ @, ~, ;, {, }, \, +, =, <, >, |, /, \\, ?, :, &, $, *, \", #, [, ] ]]></description></item></list>
     :type name: str
+    :param project: The project that this feed is associated with.
+    :type project: :class:`ProjectReference <azure.devops.v5_1.packaging.models.ProjectReference>`
     :param upstream_enabled: OBSOLETE: This should always be true.  Setting to false will override all sources in UpstreamSources.
     :type upstream_enabled: bool
     :param upstream_sources: A list of sources that this feed will fetch packages from.  An empty list indicates that this feed will not search any additional sources for packages.
@@ -1040,6 +1062,7 @@ class Feed(FeedCore):
         'id': {'key': 'id', 'type': 'str'},
         'is_read_only': {'key': 'isReadOnly', 'type': 'bool'},
         'name': {'key': 'name', 'type': 'str'},
+        'project': {'key': 'project', 'type': 'ProjectReference'},
         'upstream_enabled': {'key': 'upstreamEnabled', 'type': 'bool'},
         'upstream_sources': {'key': 'upstreamSources', 'type': '[UpstreamSource]'},
         'view': {'key': 'view', 'type': 'FeedView'},
@@ -1056,8 +1079,8 @@ class Feed(FeedCore):
         'url': {'key': 'url', 'type': 'str'}
     }
 
-    def __init__(self, allow_upstream_name_conflict=None, capabilities=None, fully_qualified_id=None, fully_qualified_name=None, id=None, is_read_only=None, name=None, upstream_enabled=None, upstream_sources=None, view=None, view_id=None, view_name=None, _links=None, badges_enabled=None, default_view_id=None, deleted_date=None, description=None, hide_deleted_package_versions=None, permissions=None, upstream_enabled_changed_date=None, url=None):
-        super(Feed, self).__init__(allow_upstream_name_conflict=allow_upstream_name_conflict, capabilities=capabilities, fully_qualified_id=fully_qualified_id, fully_qualified_name=fully_qualified_name, id=id, is_read_only=is_read_only, name=name, upstream_enabled=upstream_enabled, upstream_sources=upstream_sources, view=view, view_id=view_id, view_name=view_name)
+    def __init__(self, allow_upstream_name_conflict=None, capabilities=None, fully_qualified_id=None, fully_qualified_name=None, id=None, is_read_only=None, name=None, project=None, upstream_enabled=None, upstream_sources=None, view=None, view_id=None, view_name=None, _links=None, badges_enabled=None, default_view_id=None, deleted_date=None, description=None, hide_deleted_package_versions=None, permissions=None, upstream_enabled_changed_date=None, url=None):
+        super(Feed, self).__init__(allow_upstream_name_conflict=allow_upstream_name_conflict, capabilities=capabilities, fully_qualified_id=fully_qualified_id, fully_qualified_name=fully_qualified_name, id=id, is_read_only=is_read_only, name=name, project=project, upstream_enabled=upstream_enabled, upstream_sources=upstream_sources, view=view, view_id=view_id, view_name=view_name)
         self._links = _links
         self.badges_enabled = badges_enabled
         self.default_view_id = default_view_id
@@ -1094,6 +1117,7 @@ def __init__(self, allow_upstream_name_conflict=None, capabilities=None, fully_q
     'PackageVersionMetrics',
     'PackageVersionMetricsQuery',
     'PackageVersionProvenance',
+    'ProjectReference',
     'ProtocolMetadata',
     'Provenance',
     'RecycleBinPackageVersion',
diff --git a/azure-devops/azure/devops/v5_1/gallery/__init__.py b/azure-devops/azure/devops/v5_1/gallery/__init__.py
index 90458765..7c1c7463 100644
--- a/azure-devops/azure/devops/v5_1/gallery/__init__.py
+++ b/azure-devops/azure/devops/v5_1/gallery/__init__.py
@@ -42,6 +42,8 @@
     'ExtensionStatisticUpdate',
     'ExtensionVersion',
     'FilterCriteria',
+    'GraphSubjectBase',
+    'IdentityRef',
     'InstallationTarget',
     'MetadataItem',
     'NotificationsData',
@@ -54,6 +56,9 @@
     'PublisherFilterResult',
     'PublisherQuery',
     'PublisherQueryResult',
+    'PublisherRoleAssignment',
+    'PublisherSecurityRole',
+    'PublisherUserRoleAssignmentRef',
     'QnAItem',
     'QueryFilter',
     'Question',
diff --git a/azure-devops/azure/devops/v5_1/gallery/gallery_client.py b/azure-devops/azure/devops/v5_1/gallery/gallery_client.py
index 2fae14f0..a2675013 100644
--- a/azure-devops/azure/devops/v5_1/gallery/gallery_client.py
+++ b/azure-devops/azure/devops/v5_1/gallery/gallery_client.py
@@ -1249,6 +1249,29 @@ def update_publisher(self, publisher, publisher_name):
                               content=content)
         return self._deserialize('Publisher', response)
 
+    def update_publisher_members(self, role_assignments, publisher_name, limit_to_caller_identity_domain=None):
+        """UpdatePublisherMembers.
+        [Preview API] Endpoint to add/modify publisher membership. Currently Supports only addition/modification of 1 user at a time Works only for adding members of same tenant.
+        :param [PublisherUserRoleAssignmentRef] role_assignments: List of user identifiers(email address) and role to be added. Currently only one entry is supported.
+        :param str publisher_name: The name/id of publisher to which users have to be added
+        :param bool limit_to_caller_identity_domain: Should cross tenant addtions be allowed or not.
+        :rtype: [PublisherRoleAssignment]
+        """
+        route_values = {}
+        if publisher_name is not None:
+            route_values['publisherName'] = self._serialize.url('publisher_name', publisher_name, 'str')
+        query_parameters = {}
+        if limit_to_caller_identity_domain is not None:
+            query_parameters['limitToCallerIdentityDomain'] = self._serialize.query('limit_to_caller_identity_domain', limit_to_caller_identity_domain, 'bool')
+        content = self._serialize.body(role_assignments, '[PublisherUserRoleAssignmentRef]')
+        response = self._send(http_method='POST',
+                              location_id='4ddec66a-e4f6-4f5d-999e-9e77710d7ff4',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters,
+                              content=content)
+        return self._deserialize('[PublisherRoleAssignment]', self._unwrap_collection(response))
+
     def get_questions(self, publisher_name, extension_name, count=None, page=None, after_date=None):
         """GetQuestions.
         [Preview API] Returns a list of questions with their responses associated with an extension.
diff --git a/azure-devops/azure/devops/v5_1/gallery/models.py b/azure-devops/azure/devops/v5_1/gallery/models.py
index 9d809d39..c9837d99 100644
--- a/azure-devops/azure/devops/v5_1/gallery/models.py
+++ b/azure-devops/azure/devops/v5_1/gallery/models.py
@@ -869,6 +869,94 @@ def __init__(self, filter_type=None, value=None):
         self.value = value
 
 
+class GraphSubjectBase(Model):
+    """GraphSubjectBase.
+
+    :param _links: This field contains zero or more interesting links about the graph subject. These links may be invoked to obtain additional relationships or more detailed information about this graph subject.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.microsoft._visual_studio._services._web_api.models.ReferenceLinks>`
+    :param descriptor: The descriptor is the primary way to reference the graph subject while the system is running. This field will uniquely identify the same graph subject across both Accounts and Organizations.
+    :type descriptor: str
+    :param display_name: This is the non-unique display name of the graph subject. To change this field, you must alter its value in the source provider.
+    :type display_name: str
+    :param url: This url is the full route to the source resource of this graph subject.
+    :type url: str
+    """
+
+    _attribute_map = {
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'descriptor': {'key': 'descriptor', 'type': 'str'},
+        'display_name': {'key': 'displayName', 'type': 'str'},
+        'url': {'key': 'url', 'type': 'str'}
+    }
+
+    def __init__(self, _links=None, descriptor=None, display_name=None, url=None):
+        super(GraphSubjectBase, self).__init__()
+        self._links = _links
+        self.descriptor = descriptor
+        self.display_name = display_name
+        self.url = url
+
+
+class IdentityRef(GraphSubjectBase):
+    """IdentityRef.
+
+    :param _links: This field contains zero or more interesting links about the graph subject. These links may be invoked to obtain additional relationships or more detailed information about this graph subject.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.microsoft._visual_studio._services._web_api.models.ReferenceLinks>`
+    :param descriptor: The descriptor is the primary way to reference the graph subject while the system is running. This field will uniquely identify the same graph subject across both Accounts and Organizations.
+    :type descriptor: str
+    :param display_name: This is the non-unique display name of the graph subject. To change this field, you must alter its value in the source provider.
+    :type display_name: str
+    :param url: This url is the full route to the source resource of this graph subject.
+    :type url: str
+    :param directory_alias: Deprecated - Can be retrieved by querying the Graph user referenced in the "self" entry of the IdentityRef "_links" dictionary
+    :type directory_alias: str
+    :param id:
+    :type id: str
+    :param image_url: Deprecated - Available in the "avatar" entry of the IdentityRef "_links" dictionary
+    :type image_url: str
+    :param inactive: Deprecated - Can be retrieved by querying the Graph membership state referenced in the "membershipState" entry of the GraphUser "_links" dictionary
+    :type inactive: bool
+    :param is_aad_identity: Deprecated - Can be inferred from the subject type of the descriptor (Descriptor.IsAadUserType/Descriptor.IsAadGroupType)
+    :type is_aad_identity: bool
+    :param is_container: Deprecated - Can be inferred from the subject type of the descriptor (Descriptor.IsGroupType)
+    :type is_container: bool
+    :param is_deleted_in_origin:
+    :type is_deleted_in_origin: bool
+    :param profile_url: Deprecated - not in use in most preexisting implementations of ToIdentityRef
+    :type profile_url: str
+    :param unique_name: Deprecated - use Domain+PrincipalName instead
+    :type unique_name: str
+    """
+
+    _attribute_map = {
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'descriptor': {'key': 'descriptor', 'type': 'str'},
+        'display_name': {'key': 'displayName', 'type': 'str'},
+        'url': {'key': 'url', 'type': 'str'},
+        'directory_alias': {'key': 'directoryAlias', 'type': 'str'},
+        'id': {'key': 'id', 'type': 'str'},
+        'image_url': {'key': 'imageUrl', 'type': 'str'},
+        'inactive': {'key': 'inactive', 'type': 'bool'},
+        'is_aad_identity': {'key': 'isAadIdentity', 'type': 'bool'},
+        'is_container': {'key': 'isContainer', 'type': 'bool'},
+        'is_deleted_in_origin': {'key': 'isDeletedInOrigin', 'type': 'bool'},
+        'profile_url': {'key': 'profileUrl', 'type': 'str'},
+        'unique_name': {'key': 'uniqueName', 'type': 'str'}
+    }
+
+    def __init__(self, _links=None, descriptor=None, display_name=None, url=None, directory_alias=None, id=None, image_url=None, inactive=None, is_aad_identity=None, is_container=None, is_deleted_in_origin=None, profile_url=None, unique_name=None):
+        super(IdentityRef, self).__init__(_links=_links, descriptor=descriptor, display_name=display_name, url=url)
+        self.directory_alias = directory_alias
+        self.id = id
+        self.image_url = image_url
+        self.inactive = inactive
+        self.is_aad_identity = is_aad_identity
+        self.is_container = is_container
+        self.is_deleted_in_origin = is_deleted_in_origin
+        self.profile_url = profile_url
+        self.unique_name = unique_name
+
+
 class InstallationTarget(Model):
     """InstallationTarget.
 
@@ -1189,6 +1277,98 @@ def __init__(self, results=None):
         self.results = results
 
 
+class PublisherRoleAssignment(Model):
+    """PublisherRoleAssignment.
+
+    :param access: Designates the role as explicitly assigned or inherited.
+    :type access: object
+    :param access_display_name: User friendly description of access assignment.
+    :type access_display_name: str
+    :param identity: The user to whom the role is assigned.
+    :type identity: :class:`IdentityRef <azure.devops.v5_1.gallery.models.IdentityRef>`
+    :param role: The role assigned to the user.
+    :type role: :class:`PublisherSecurityRole <azure.devops.v5_1.gallery.models.PublisherSecurityRole>`
+    """
+
+    _attribute_map = {
+        'access': {'key': 'access', 'type': 'object'},
+        'access_display_name': {'key': 'accessDisplayName', 'type': 'str'},
+        'identity': {'key': 'identity', 'type': 'IdentityRef'},
+        'role': {'key': 'role', 'type': 'PublisherSecurityRole'}
+    }
+
+    def __init__(self, access=None, access_display_name=None, identity=None, role=None):
+        super(PublisherRoleAssignment, self).__init__()
+        self.access = access
+        self.access_display_name = access_display_name
+        self.identity = identity
+        self.role = role
+
+
+class PublisherSecurityRole(Model):
+    """PublisherSecurityRole.
+
+    :param allow_permissions: Permissions the role is allowed.
+    :type allow_permissions: int
+    :param deny_permissions: Permissions the role is denied.
+    :type deny_permissions: int
+    :param description: Description of user access defined by the role
+    :type description: str
+    :param display_name: User friendly name of the role.
+    :type display_name: str
+    :param identifier: Globally unique identifier for the role.
+    :type identifier: str
+    :param name: Unique name of the role in the scope.
+    :type name: str
+    :param scope: Returns the id of the ParentScope.
+    :type scope: str
+    """
+
+    _attribute_map = {
+        'allow_permissions': {'key': 'allowPermissions', 'type': 'int'},
+        'deny_permissions': {'key': 'denyPermissions', 'type': 'int'},
+        'description': {'key': 'description', 'type': 'str'},
+        'display_name': {'key': 'displayName', 'type': 'str'},
+        'identifier': {'key': 'identifier', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'scope': {'key': 'scope', 'type': 'str'}
+    }
+
+    def __init__(self, allow_permissions=None, deny_permissions=None, description=None, display_name=None, identifier=None, name=None, scope=None):
+        super(PublisherSecurityRole, self).__init__()
+        self.allow_permissions = allow_permissions
+        self.deny_permissions = deny_permissions
+        self.description = description
+        self.display_name = display_name
+        self.identifier = identifier
+        self.name = name
+        self.scope = scope
+
+
+class PublisherUserRoleAssignmentRef(Model):
+    """PublisherUserRoleAssignmentRef.
+
+    :param role_name: The name of the role assigned.
+    :type role_name: str
+    :param unique_name: Identifier of the user given the role assignment.
+    :type unique_name: str
+    :param user_id: Unique id of the user given the role assignment.
+    :type user_id: str
+    """
+
+    _attribute_map = {
+        'role_name': {'key': 'roleName', 'type': 'str'},
+        'unique_name': {'key': 'uniqueName', 'type': 'str'},
+        'user_id': {'key': 'userId', 'type': 'str'}
+    }
+
+    def __init__(self, role_name=None, unique_name=None, user_id=None):
+        super(PublisherUserRoleAssignmentRef, self).__init__()
+        self.role_name = role_name
+        self.unique_name = unique_name
+        self.user_id = user_id
+
+
 class QnAItem(Model):
     """QnAItem.
 
@@ -1825,6 +2005,8 @@ def __init__(self, display_name=None, email_address=None, extensions=None, flags
     'ExtensionStatisticUpdate',
     'ExtensionVersion',
     'FilterCriteria',
+    'GraphSubjectBase',
+    'IdentityRef',
     'InstallationTarget',
     'MetadataItem',
     'NotificationsData',
@@ -1836,6 +2018,9 @@ def __init__(self, display_name=None, email_address=None, extensions=None, flags
     'PublisherFilterResult',
     'PublisherQuery',
     'PublisherQueryResult',
+    'PublisherRoleAssignment',
+    'PublisherSecurityRole',
+    'PublisherUserRoleAssignmentRef',
     'QnAItem',
     'QueryFilter',
     'Question',
diff --git a/azure-devops/azure/devops/v5_1/git/git_client_base.py b/azure-devops/azure/devops/v5_1/git/git_client_base.py
index 6e6feca9..6dd323e7 100644
--- a/azure-devops/azure/devops/v5_1/git/git_client_base.py
+++ b/azure-devops/azure/devops/v5_1/git/git_client_base.py
@@ -3017,6 +3017,24 @@ def update_repository(self, new_repository_info, repository_id, project=None):
                               content=content)
         return self._deserialize('GitRepository', response)
 
+    def get_stats(self, project, repository_id):
+        """GetStats.
+        [Preview API] Retrieves statistics of a repository.
+        :param str project: Project ID or project name
+        :param str repository_id: Friendly name or guid of repository.
+        :rtype: :class:`<GitRepositoryStats> <azure.devops.v5_1.git.models.GitRepositoryStats>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if repository_id is not None:
+            route_values['repositoryId'] = self._serialize.url('repository_id', repository_id, 'str')
+        response = self._send(http_method='GET',
+                              location_id='616a5255-74b3-40f5-ae1d-bbae2eec8db5',
+                              version='5.1-preview.1',
+                              route_values=route_values)
+        return self._deserialize('GitRepositoryStats', response)
+
     def create_revert(self, revert_to_create, project, repository_id):
         """CreateRevert.
         [Preview API] Starts the operation to create a new branch which reverts changes introduced by either a specific commit or commits that are associated to a pull request.
diff --git a/azure-devops/azure/devops/v5_1/git/models.py b/azure-devops/azure/devops/v5_1/git/models.py
index 82d7b332..7cba6949 100644
--- a/azure-devops/azure/devops/v5_1/git/models.py
+++ b/azure-devops/azure/devops/v5_1/git/models.py
@@ -1561,7 +1561,9 @@ class GitPullRequestCompletionOptions(Model):
     :type delete_source_branch: bool
     :param merge_commit_message: If set, this will be used as the commit message of the merge commit.
     :type merge_commit_message: str
-    :param squash_merge: If true, the commits in the pull request will be squash-merged into the specified target branch on completion.
+    :param merge_strategy: Specify the strategy used to merge the pull request during completion. If MergeStrategy is not set to any value, a no-FF merge will be created if SquashMerge == false. If MergeStrategy is not set to any value, the pull request commits will be squash if SquashMerge == true. The SquashMerge member is deprecated. It is recommended that you explicitly set MergeStrategy in all cases. If an explicit value is provided for MergeStrategy, the SquashMerge member will be ignored.
+    :type merge_strategy: object
+    :param squash_merge: SquashMerge is deprecated. You should explicity set the value of MergeStrategy. If MergeStrategy is set to any value, the SquashMerge value will be ignored. If MergeStrategy is not set, the merge strategy will be no-fast-forward if this flag is false, or squash if true.
     :type squash_merge: bool
     :param transition_work_items: If true, we will attempt to transition any work items linked to the pull request into the next logical state (i.e. Active -> Resolved)
     :type transition_work_items: bool
@@ -1574,17 +1576,19 @@ class GitPullRequestCompletionOptions(Model):
         'bypass_reason': {'key': 'bypassReason', 'type': 'str'},
         'delete_source_branch': {'key': 'deleteSourceBranch', 'type': 'bool'},
         'merge_commit_message': {'key': 'mergeCommitMessage', 'type': 'str'},
+        'merge_strategy': {'key': 'mergeStrategy', 'type': 'object'},
         'squash_merge': {'key': 'squashMerge', 'type': 'bool'},
         'transition_work_items': {'key': 'transitionWorkItems', 'type': 'bool'},
         'triggered_by_auto_complete': {'key': 'triggeredByAutoComplete', 'type': 'bool'}
     }
 
-    def __init__(self, bypass_policy=None, bypass_reason=None, delete_source_branch=None, merge_commit_message=None, squash_merge=None, transition_work_items=None, triggered_by_auto_complete=None):
+    def __init__(self, bypass_policy=None, bypass_reason=None, delete_source_branch=None, merge_commit_message=None, merge_strategy=None, squash_merge=None, transition_work_items=None, triggered_by_auto_complete=None):
         super(GitPullRequestCompletionOptions, self).__init__()
         self.bypass_policy = bypass_policy
         self.bypass_reason = bypass_reason
         self.delete_source_branch = delete_source_branch
         self.merge_commit_message = merge_commit_message
+        self.merge_strategy = merge_strategy
         self.squash_merge = squash_merge
         self.transition_work_items = transition_work_items
         self.triggered_by_auto_complete = triggered_by_auto_complete
@@ -2923,7 +2927,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
diff --git a/azure-devops/azure/devops/v5_1/graph/__init__.py b/azure-devops/azure/devops/v5_1/graph/__init__.py
index cb112045..c0926e02 100644
--- a/azure-devops/azure/devops/v5_1/graph/__init__.py
+++ b/azure-devops/azure/devops/v5_1/graph/__init__.py
@@ -10,6 +10,7 @@
 from .graph_client import GraphClient
 
 __all__ = [
+    'Avatar',
     'GraphCachePolicies',
     'GraphDescriptorResult',
     'GraphFederatedProviderData',
@@ -29,6 +30,7 @@
     'GraphSubjectLookupKey',
     'GraphUser',
     'GraphUserCreationContext',
+    'GraphUserUpdateContext',
     'JsonPatchOperation',
     'PagedGraphGroups',
     'PagedGraphUsers',
diff --git a/azure-devops/azure/devops/v5_1/graph/graph_client.py b/azure-devops/azure/devops/v5_1/graph/graph_client.py
index 43a29408..0ec5d5ad 100644
--- a/azure-devops/azure/devops/v5_1/graph/graph_client.py
+++ b/azure-devops/azure/devops/v5_1/graph/graph_client.py
@@ -25,6 +25,58 @@ def __init__(self, base_url=None, creds=None):
 
     resource_area_identifier = 'bb1e7ec9-e901-4b68-999a-de7012b920f8'
 
+    def delete_avatar(self, subject_descriptor):
+        """DeleteAvatar.
+        [Preview API]
+        :param str subject_descriptor:
+        """
+        route_values = {}
+        if subject_descriptor is not None:
+            route_values['subjectDescriptor'] = self._serialize.url('subject_descriptor', subject_descriptor, 'str')
+        self._send(http_method='DELETE',
+                   location_id='801eaf9c-0585-4be8-9cdb-b0efa074de91',
+                   version='5.1-preview.1',
+                   route_values=route_values)
+
+    def get_avatar(self, subject_descriptor, size=None, format=None):
+        """GetAvatar.
+        [Preview API]
+        :param str subject_descriptor:
+        :param str size:
+        :param str format:
+        :rtype: :class:`<Avatar> <azure.devops.v5_1.graph.models.Avatar>`
+        """
+        route_values = {}
+        if subject_descriptor is not None:
+            route_values['subjectDescriptor'] = self._serialize.url('subject_descriptor', subject_descriptor, 'str')
+        query_parameters = {}
+        if size is not None:
+            query_parameters['size'] = self._serialize.query('size', size, 'str')
+        if format is not None:
+            query_parameters['format'] = self._serialize.query('format', format, 'str')
+        response = self._send(http_method='GET',
+                              location_id='801eaf9c-0585-4be8-9cdb-b0efa074de91',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('Avatar', response)
+
+    def set_avatar(self, avatar, subject_descriptor):
+        """SetAvatar.
+        [Preview API]
+        :param :class:`<Avatar> <azure.devops.v5_1.graph.models.Avatar>` avatar:
+        :param str subject_descriptor:
+        """
+        route_values = {}
+        if subject_descriptor is not None:
+            route_values['subjectDescriptor'] = self._serialize.url('subject_descriptor', subject_descriptor, 'str')
+        content = self._serialize.body(avatar, 'Avatar')
+        self._send(http_method='PUT',
+                   location_id='801eaf9c-0585-4be8-9cdb-b0efa074de91',
+                   version='5.1-preview.1',
+                   route_values=route_values,
+                   content=content)
+
     def get_descriptor(self, storage_key):
         """GetDescriptor.
         [Preview API] Resolve a storage key to a descriptor
@@ -352,3 +404,21 @@ def list_users(self, subject_types=None, continuation_token=None):
         response_object.continuation_token = response.headers.get('X-MS-ContinuationToken')
         return response_object
 
+    def update_user(self, update_context, user_descriptor):
+        """UpdateUser.
+        [Preview API] Map an existing user to a different identity
+        :param :class:`<GraphUserUpdateContext> <azure.devops.v5_1.graph.models.GraphUserUpdateContext>` update_context: The subset of the full graph user used to uniquely find the graph subject in an external provider.
+        :param str user_descriptor: the descriptor of the user to update
+        :rtype: :class:`<GraphUser> <azure.devops.v5_1.graph.models.GraphUser>`
+        """
+        route_values = {}
+        if user_descriptor is not None:
+            route_values['userDescriptor'] = self._serialize.url('user_descriptor', user_descriptor, 'str')
+        content = self._serialize.body(update_context, 'GraphUserUpdateContext')
+        response = self._send(http_method='PATCH',
+                              location_id='005e26ec-6b77-4e4f-a986-b3827bf241f5',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              content=content)
+        return self._deserialize('GraphUser', response)
+
diff --git a/azure-devops/azure/devops/v5_1/graph/models.py b/azure-devops/azure/devops/v5_1/graph/models.py
index 59805434..69fdeed3 100644
--- a/azure-devops/azure/devops/v5_1/graph/models.py
+++ b/azure-devops/azure/devops/v5_1/graph/models.py
@@ -9,6 +9,34 @@
 from msrest.serialization import Model
 
 
+class Avatar(Model):
+    """Avatar.
+
+    :param is_auto_generated:
+    :type is_auto_generated: bool
+    :param size:
+    :type size: object
+    :param time_stamp:
+    :type time_stamp: datetime
+    :param value:
+    :type value: str
+    """
+
+    _attribute_map = {
+        'is_auto_generated': {'key': 'isAutoGenerated', 'type': 'bool'},
+        'size': {'key': 'size', 'type': 'object'},
+        'time_stamp': {'key': 'timeStamp', 'type': 'iso-8601'},
+        'value': {'key': 'value', 'type': 'str'}
+    }
+
+    def __init__(self, is_auto_generated=None, size=None, time_stamp=None, value=None):
+        super(Avatar, self).__init__()
+        self.is_auto_generated = is_auto_generated
+        self.size = size
+        self.time_stamp = time_stamp
+        self.value = value
+
+
 class GraphCachePolicies(Model):
     """GraphCachePolicies.
 
@@ -329,6 +357,22 @@ def __init__(self, storage_key=None):
         self.storage_key = storage_key
 
 
+class GraphUserUpdateContext(Model):
+    """GraphUserUpdateContext.
+
+    :param storage_key: Storage key should not be specified in case of updating user
+    :type storage_key: str
+    """
+
+    _attribute_map = {
+        'storage_key': {'key': 'storageKey', 'type': 'str'}
+    }
+
+    def __init__(self, storage_key=None):
+        super(GraphUserUpdateContext, self).__init__()
+        self.storage_key = storage_key
+
+
 class JsonPatchOperation(Model):
     """JsonPatchOperation.
 
@@ -336,7 +380,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
@@ -704,6 +748,7 @@ def __init__(self, _links=None, descriptor=None, display_name=None, url=None, le
 
 
 __all__ = [
+    'Avatar',
     'GraphCachePolicies',
     'GraphDescriptorResult',
     'GraphFederatedProviderData',
@@ -718,6 +763,7 @@ def __init__(self, _links=None, descriptor=None, display_name=None, url=None, le
     'GraphSubjectLookup',
     'GraphSubjectLookupKey',
     'GraphUserCreationContext',
+    'GraphUserUpdateContext',
     'JsonPatchOperation',
     'PagedGraphGroups',
     'PagedGraphUsers',
diff --git a/azure-devops/azure/devops/v5_1/identity/models.py b/azure-devops/azure/devops/v5_1/identity/models.py
index 159559bb..cd776a31 100644
--- a/azure-devops/azure/devops/v5_1/identity/models.py
+++ b/azure-devops/azure/devops/v5_1/identity/models.py
@@ -476,7 +476,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
@@ -557,19 +557,23 @@ class TenantInfo(Model):
     :type tenant_id: str
     :param tenant_name:
     :type tenant_name: str
+    :param verified_domains:
+    :type verified_domains: list of str
     """
 
     _attribute_map = {
         'home_tenant': {'key': 'homeTenant', 'type': 'bool'},
         'tenant_id': {'key': 'tenantId', 'type': 'str'},
-        'tenant_name': {'key': 'tenantName', 'type': 'str'}
+        'tenant_name': {'key': 'tenantName', 'type': 'str'},
+        'verified_domains': {'key': 'verifiedDomains', 'type': '[str]'}
     }
 
-    def __init__(self, home_tenant=None, tenant_id=None, tenant_name=None):
+    def __init__(self, home_tenant=None, tenant_id=None, tenant_name=None, verified_domains=None):
         super(TenantInfo, self).__init__()
         self.home_tenant = home_tenant
         self.tenant_id = tenant_id
         self.tenant_name = tenant_name
+        self.verified_domains = verified_domains
 
 
 class Identity(IdentityBase):
diff --git a/azure-devops/azure/devops/v5_1/member_entitlement_management/models.py b/azure-devops/azure/devops/v5_1/member_entitlement_management/models.py
index 75d6f4d0..b4b31254 100644
--- a/azure-devops/azure/devops/v5_1/member_entitlement_management/models.py
+++ b/azure-devops/azure/devops/v5_1/member_entitlement_management/models.py
@@ -242,7 +242,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
diff --git a/azure-devops/azure/devops/v5_1/notification/notification_client.py b/azure-devops/azure/devops/v5_1/notification/notification_client.py
index e113a964..35d25e3a 100644
--- a/azure-devops/azure/devops/v5_1/notification/notification_client.py
+++ b/azure-devops/azure/devops/v5_1/notification/notification_client.py
@@ -86,7 +86,7 @@ def update_subscription_diagnostics(self, update_parameters, subscription_id):
 
     def publish_event(self, notification_event):
         """PublishEvent.
-        [Preview API] Publish an event.
+        [Preview API] Publish an event. This request must be directed to the service "extmgmt".
         :param :class:`<VssNotificationEvent> <azure.devops.v5_1.notification.models.VssNotificationEvent>` notification_event:
         :rtype: :class:`<VssNotificationEvent> <azure.devops.v5_1.notification.models.VssNotificationEvent>`
         """
diff --git a/azure-devops/azure/devops/v5_1/npm/models.py b/azure-devops/azure/devops/v5_1/npm/models.py
index 252da241..0aca121c 100644
--- a/azure-devops/azure/devops/v5_1/npm/models.py
+++ b/azure-devops/azure/devops/v5_1/npm/models.py
@@ -28,7 +28,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
diff --git a/azure-devops/azure/devops/v5_1/nuget/models.py b/azure-devops/azure/devops/v5_1/nuget/models.py
index ddce4906..6bca3f3d 100644
--- a/azure-devops/azure/devops/v5_1/nuget/models.py
+++ b/azure-devops/azure/devops/v5_1/nuget/models.py
@@ -28,7 +28,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
diff --git a/azure-devops/azure/devops/v5_1/pipelines/__init__.py b/azure-devops/azure/devops/v5_1/pipelines/__init__.py
new file mode 100644
index 00000000..86dd5906
--- /dev/null
+++ b/azure-devops/azure/devops/v5_1/pipelines/__init__.py
@@ -0,0 +1,16 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+# Generated file, DO NOT EDIT
+# Changes may cause incorrect behavior and will be lost if the code is regenerated.
+# --------------------------------------------------------------------------------------------
+
+from .models import *
+from .pipelines_client import PipelinesClient
+
+__all__ = [
+    'Pipeline',
+    'PipelineConfiguration',
+    'PipelinesClient'
+]
diff --git a/azure-devops/azure/devops/v5_1/pipelines/models.py b/azure-devops/azure/devops/v5_1/pipelines/models.py
new file mode 100644
index 00000000..ca8f8741
--- /dev/null
+++ b/azure-devops/azure/devops/v5_1/pipelines/models.py
@@ -0,0 +1,51 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+# Generated file, DO NOT EDIT
+# Changes may cause incorrect behavior and will be lost if the code is regenerated.
+# --------------------------------------------------------------------------------------------
+
+from msrest.serialization import Model
+
+
+class Pipeline(Model):
+    """Pipeline.
+
+    :param configuration:
+    :type configuration: :class:`PipelineConfiguration <azure.devops.v5_1.pipelines.models.PipelineConfiguration>`
+    :param id:
+    :type id: int
+    """
+
+    _attribute_map = {
+        'configuration': {'key': 'configuration', 'type': 'PipelineConfiguration'},
+        'id': {'key': 'id', 'type': 'int'}
+    }
+
+    def __init__(self, configuration=None, id=None):
+        super(Pipeline, self).__init__()
+        self.configuration = configuration
+        self.id = id
+
+
+class PipelineConfiguration(Model):
+    """PipelineConfiguration.
+
+    :param type:
+    :type type: object
+    """
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'object'}
+    }
+
+    def __init__(self, type=None):
+        super(PipelineConfiguration, self).__init__()
+        self.type = type
+
+
+__all__ = [
+    'Pipeline',
+    'PipelineConfiguration',
+]
diff --git a/azure-devops/azure/devops/v5_1/pipelines/pipelines_client.py b/azure-devops/azure/devops/v5_1/pipelines/pipelines_client.py
new file mode 100644
index 00000000..387b0428
--- /dev/null
+++ b/azure-devops/azure/devops/v5_1/pipelines/pipelines_client.py
@@ -0,0 +1,50 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+# Generated file, DO NOT EDIT
+# Changes may cause incorrect behavior and will be lost if the code is regenerated.
+# --------------------------------------------------------------------------------------------
+
+from msrest import Serializer, Deserializer
+from ...client import Client
+from . import models
+
+
+class PipelinesClient(Client):
+    """Pipelines
+    :param str base_url: Service URL
+    :param Authentication creds: Authenticated credentials.
+    """
+
+    def __init__(self, base_url=None, creds=None):
+        super(PipelinesClient, self).__init__(base_url, creds)
+        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
+        self._serialize = Serializer(client_models)
+        self._deserialize = Deserializer(client_models)
+
+    resource_area_identifier = None
+
+    def get_pipeline(self, project, pipeline_id, revision=None):
+        """GetPipeline.
+        [Preview API]
+        :param str project: Project ID or project name
+        :param int pipeline_id:
+        :param int revision:
+        :rtype: :class:`<Pipeline> <azure.devops.v5_1.pipelines.models.Pipeline>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if pipeline_id is not None:
+            route_values['pipelineId'] = self._serialize.url('pipeline_id', pipeline_id, 'int')
+        query_parameters = {}
+        if revision is not None:
+            query_parameters['revision'] = self._serialize.query('revision', revision, 'int')
+        response = self._send(http_method='GET',
+                              location_id='28e1305e-2afe-47bf-abaf-cbb0e6a91988',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('Pipeline', response)
+
diff --git a/azure-devops/azure/devops/v5_1/py_pi_api/models.py b/azure-devops/azure/devops/v5_1/py_pi_api/models.py
index fd41f992..a94be18e 100644
--- a/azure-devops/azure/devops/v5_1/py_pi_api/models.py
+++ b/azure-devops/azure/devops/v5_1/py_pi_api/models.py
@@ -28,7 +28,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
diff --git a/azure-devops/azure/devops/v5_1/release/__init__.py b/azure-devops/azure/devops/v5_1/release/__init__.py
index 598b068c..f3e2ea9b 100644
--- a/azure-devops/azure/devops/v5_1/release/__init__.py
+++ b/azure-devops/azure/devops/v5_1/release/__init__.py
@@ -23,6 +23,7 @@
     'AutoTriggerIssue',
     'BuildVersion',
     'Change',
+    'ComplianceSettings',
     'Condition',
     'ConfigurationVariableValue',
     'DataSourceBindingBase',
diff --git a/azure-devops/azure/devops/v5_1/release/models.py b/azure-devops/azure/devops/v5_1/release/models.py
index a2386348..1926f56b 100644
--- a/azure-devops/azure/devops/v5_1/release/models.py
+++ b/azure-devops/azure/devops/v5_1/release/models.py
@@ -433,6 +433,22 @@ def __init__(self, author=None, change_type=None, display_uri=None, id=None, loc
         self.timestamp = timestamp
 
 
+class ComplianceSettings(Model):
+    """ComplianceSettings.
+
+    :param block_release_definition_save_if_secret_present: Block Release Definition save if any secrets is saved in Release Definition.
+    :type block_release_definition_save_if_secret_present: bool
+    """
+
+    _attribute_map = {
+        'block_release_definition_save_if_secret_present': {'key': 'blockReleaseDefinitionSaveIfSecretPresent', 'type': 'bool'}
+    }
+
+    def __init__(self, block_release_definition_save_if_secret_present=None):
+        super(ComplianceSettings, self).__init__()
+        self.block_release_definition_save_if_secret_present = block_release_definition_save_if_secret_present
+
+
 class Condition(Model):
     """Condition.
 
@@ -1264,21 +1280,21 @@ def __init__(self, dependency_input_ids=None, description=None, group_name=None,
 class InputValidation(Model):
     """InputValidation.
 
-    :param data_type:
+    :param data_type: Gets or sets the data data type to validate.
     :type data_type: object
-    :param is_required:
+    :param is_required: Gets or sets if this is a required field.
     :type is_required: bool
-    :param max_length:
+    :param max_length: Gets or sets the maximum length of this descriptor.
     :type max_length: int
-    :param max_value:
+    :param max_value: Gets or sets the minimum value for this descriptor.
     :type max_value: decimal
-    :param min_length:
+    :param min_length: Gets or sets the minimum length of this descriptor.
     :type min_length: int
-    :param min_value:
+    :param min_value: Gets or sets the minimum value for this descriptor.
     :type min_value: decimal
-    :param pattern:
+    :param pattern: Gets or sets the pattern to validate.
     :type pattern: str
-    :param pattern_mismatch_error_message:
+    :param pattern_mismatch_error_message: Gets or sets the error on pattern mismatch.
     :type pattern_mismatch_error_message: str
     """
 
@@ -2817,16 +2833,20 @@ def __init__(self, days_to_release=None, job_id=None, schedule_only_with_changes
 class ReleaseSettings(Model):
     """ReleaseSettings.
 
+    :param compliance_settings: Release Compliance settings.
+    :type compliance_settings: :class:`ComplianceSettings <azure.devops.v5_1.release.models.ComplianceSettings>`
     :param retention_settings: Release retention settings.
     :type retention_settings: :class:`RetentionSettings <azure.devops.v5_1.release.models.RetentionSettings>`
     """
 
     _attribute_map = {
+        'compliance_settings': {'key': 'complianceSettings', 'type': 'ComplianceSettings'},
         'retention_settings': {'key': 'retentionSettings', 'type': 'RetentionSettings'}
     }
 
-    def __init__(self, retention_settings=None):
+    def __init__(self, compliance_settings=None, retention_settings=None):
         super(ReleaseSettings, self).__init__()
+        self.compliance_settings = compliance_settings
         self.retention_settings = retention_settings
 
 
@@ -3161,6 +3181,8 @@ class SourcePullRequestVersion(Model):
     :type pull_request_id: str
     :param pull_request_merged_at: Date and time of the pull request merge creation. It is required to keep timeline record of Releases created by pull request.
     :type pull_request_merged_at: datetime
+    :param source_branch: Source branch of the Pull Request.
+    :type source_branch: str
     :param source_branch_commit_id: Source branch commit Id of the Pull Request for which the release will publish status.
     :type source_branch_commit_id: str
     :param target_branch: Target branch of the Pull Request.
@@ -3170,14 +3192,16 @@ class SourcePullRequestVersion(Model):
     _attribute_map = {
         'pull_request_id': {'key': 'pullRequestId', 'type': 'str'},
         'pull_request_merged_at': {'key': 'pullRequestMergedAt', 'type': 'iso-8601'},
+        'source_branch': {'key': 'sourceBranch', 'type': 'str'},
         'source_branch_commit_id': {'key': 'sourceBranchCommitId', 'type': 'str'},
         'target_branch': {'key': 'targetBranch', 'type': 'str'}
     }
 
-    def __init__(self, pull_request_id=None, pull_request_merged_at=None, source_branch_commit_id=None, target_branch=None):
+    def __init__(self, pull_request_id=None, pull_request_merged_at=None, source_branch=None, source_branch_commit_id=None, target_branch=None):
         super(SourcePullRequestVersion, self).__init__()
         self.pull_request_id = pull_request_id
         self.pull_request_merged_at = pull_request_merged_at
+        self.source_branch = source_branch
         self.source_branch_commit_id = source_branch_commit_id
         self.target_branch = target_branch
 
@@ -3672,6 +3696,7 @@ def __init__(self, id=None, tasks=None):
     'AutoTriggerIssue',
     'BuildVersion',
     'Change',
+    'ComplianceSettings',
     'Condition',
     'ConfigurationVariableValue',
     'DataSourceBindingBase',
diff --git a/azure-devops/azure/devops/v5_1/release/release_client.py b/azure-devops/azure/devops/v5_1/release/release_client.py
index 820ece1b..3e74abe1 100644
--- a/azure-devops/azure/devops/v5_1/release/release_client.py
+++ b/azure-devops/azure/devops/v5_1/release/release_client.py
@@ -370,6 +370,27 @@ def get_deployments(self, project, definition_id=None, definition_environment_id
                               query_parameters=query_parameters)
         return self._deserialize('[Deployment]', self._unwrap_collection(response))
 
+    def get_release_environment(self, project, release_id, environment_id):
+        """GetReleaseEnvironment.
+        [Preview API] Get a release environment.
+        :param str project: Project ID or project name
+        :param int release_id: Id of the release.
+        :param int environment_id: Id of the release environment.
+        :rtype: :class:`<ReleaseEnvironment> <azure.devops.v5_1.release.models.ReleaseEnvironment>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if release_id is not None:
+            route_values['releaseId'] = self._serialize.url('release_id', release_id, 'int')
+        if environment_id is not None:
+            route_values['environmentId'] = self._serialize.url('environment_id', environment_id, 'int')
+        response = self._send(http_method='GET',
+                              location_id='a7e426b1-03dc-48af-9dfe-c98bac612dcb',
+                              version='5.1-preview.6',
+                              route_values=route_values)
+        return self._deserialize('ReleaseEnvironment', response)
+
     def update_release_environment(self, environment_update_data, project, release_id, environment_id):
         """UpdateReleaseEnvironment.
         [Preview API] Update the status of a release environment
diff --git a/azure-devops/azure/devops/v5_1/service_endpoint/models.py b/azure-devops/azure/devops/v5_1/service_endpoint/models.py
index d296ce91..df4f841d 100644
--- a/azure-devops/azure/devops/v5_1/service_endpoint/models.py
+++ b/azure-devops/azure/devops/v5_1/service_endpoint/models.py
@@ -60,9 +60,9 @@ def __init__(self, access_token=None, refresh_token_cache=None):
 class AuthenticationSchemeReference(Model):
     """AuthenticationSchemeReference.
 
-    :param inputs:
+    :param inputs: Gets or sets the key and value of the fields used for authentication.
     :type inputs: dict
-    :param type:
+    :param type: Gets or sets the type of authentication scheme of an endpoint.
     :type type: str
     """
 
@@ -212,27 +212,27 @@ def __init__(self, value=None):
 class DataSource(Model):
     """DataSource.
 
-    :param authentication_scheme:
+    :param authentication_scheme: Gets or sets the authentication scheme for the endpoint request.
     :type authentication_scheme: :class:`AuthenticationSchemeReference <azure.devops.v5_1.service_endpoint.models.AuthenticationSchemeReference>`
-    :param callback_context_template:
+    :param callback_context_template: Gets or sets the pagination format supported by this data source(ContinuationToken/SkipTop).
     :type callback_context_template: str
-    :param callback_required_template:
+    :param callback_required_template: Gets or sets the template to check if subsequent call is needed.
     :type callback_required_template: str
-    :param endpoint_url:
+    :param endpoint_url: Gets or sets the endpoint url of the data source.
     :type endpoint_url: str
-    :param headers:
+    :param headers: Gets or sets the authorization headers of the request.
     :type headers: list of :class:`AuthorizationHeader <azure.devops.v5_1.service_endpoint.models.AuthorizationHeader>`
-    :param initial_context_template:
+    :param initial_context_template: Gets or sets the initial value of the query params.
     :type initial_context_template: str
-    :param name:
+    :param name: Gets or sets the name of the data source.
     :type name: str
-    :param request_content:
+    :param request_content: Gets or sets the request content of the endpoint request.
     :type request_content: str
-    :param request_verb:
+    :param request_verb: Gets or sets the request method of the endpoint request.
     :type request_verb: str
-    :param resource_url:
+    :param resource_url: Gets or sets the resource url of the endpoint request.
     :type resource_url: str
-    :param result_selector:
+    :param result_selector: Gets or sets the result selector to filter the response of the endpoint request.
     :type result_selector: str
     """
 
@@ -380,9 +380,9 @@ def __init__(self, data_source_name=None, data_source_url=None, headers=None, in
 class DependencyBinding(Model):
     """DependencyBinding.
 
-    :param key:
+    :param key: Gets or sets the value of the field on which url is dependent.
     :type key: str
-    :param value:
+    :param value: Gets or sets the corresponding value of url.
     :type value: str
     """
 
@@ -400,9 +400,9 @@ def __init__(self, key=None, value=None):
 class DependencyData(Model):
     """DependencyData.
 
-    :param input:
+    :param input: Gets or sets the category of dependency data.
     :type input: str
-    :param map:
+    :param map: Gets or sets the key-value pair to specify properties and their values.
     :type map: list of { key: str; value: [{ key: str; value: str }] }
     """
 
@@ -420,9 +420,9 @@ def __init__(self, input=None, map=None):
 class DependsOn(Model):
     """DependsOn.
 
-    :param input:
+    :param input: Gets or sets the ID of the field on which URL's value is dependent.
     :type input: str
-    :param map:
+    :param map: Gets or sets key-value pair containing other's field value and corresponding url value.
     :type map: list of :class:`DependencyBinding <azure.devops.v5_1.service_endpoint.models.DependencyBinding>`
     """
 
@@ -520,9 +520,9 @@ def __init__(self, _links=None, descriptor=None, display_name=None, url=None):
 class HelpLink(Model):
     """HelpLink.
 
-    :param text:
+    :param text: Gets or sets the help text.
     :type text: str
-    :param url:
+    :param url: Gets or sets the public url of the help documentation.
     :type url: str
     """
 
@@ -668,21 +668,21 @@ def __init__(self, dependency_input_ids=None, description=None, group_name=None,
 class InputValidation(Model):
     """InputValidation.
 
-    :param data_type:
+    :param data_type: Gets or sets the data data type to validate.
     :type data_type: object
-    :param is_required:
+    :param is_required: Gets or sets if this is a required field.
     :type is_required: bool
-    :param max_length:
+    :param max_length: Gets or sets the maximum length of this descriptor.
     :type max_length: int
-    :param max_value:
+    :param max_value: Gets or sets the minimum value for this descriptor.
     :type max_value: decimal
-    :param min_length:
+    :param min_length: Gets or sets the minimum length of this descriptor.
     :type min_length: int
-    :param min_value:
+    :param min_value: Gets or sets the minimum value for this descriptor.
     :type min_value: decimal
-    :param pattern:
+    :param pattern: Gets or sets the pattern to validate.
     :type pattern: str
-    :param pattern_mismatch_error_message:
+    :param pattern_mismatch_error_message: Gets or sets the error on pattern mismatch.
     :type pattern_mismatch_error_message: str
     """
 
@@ -946,7 +946,7 @@ class ServiceEndpoint(Model):
     :type data: dict
     :param description: Gets or sets the description of endpoint.
     :type description: str
-    :param group_scope_id:
+    :param group_scope_id: This is a deprecated field.
     :type group_scope_id: str
     :param id: Gets or sets the identifier of this endpoint.
     :type id: str
@@ -1014,7 +1014,7 @@ class ServiceEndpointAuthenticationScheme(Model):
     :type authorization_url: str
     :param client_certificates: Gets or sets the certificates of service endpoint authentication scheme.
     :type client_certificates: list of :class:`ClientCertificate <azure.devops.v5_1.service_endpoint.models.ClientCertificate>`
-    :param data_source_bindings:
+    :param data_source_bindings: Gets or sets the data source bindings of the endpoint.
     :type data_source_bindings: list of :class:`DataSourceBinding <azure.devops.v5_1.service_endpoint.models.DataSourceBinding>`
     :param display_name: Gets or sets the display name for the service endpoint authentication scheme.
     :type display_name: str
@@ -1250,7 +1250,7 @@ class ServiceEndpointType(Model):
     :type endpoint_url: :class:`EndpointUrl <azure.devops.v5_1.service_endpoint.models.EndpointUrl>`
     :param help_link: Gets or sets the help link of service endpoint type.
     :type help_link: :class:`HelpLink <azure.devops.v5_1.service_endpoint.models.HelpLink>`
-    :param help_mark_down:
+    :param help_mark_down: Gets or sets the help text shown at the endpoint create dialog.
     :type help_mark_down: str
     :param icon_url: Gets or sets the icon url of service endpoint type.
     :type icon_url: str
diff --git a/azure-devops/azure/devops/v5_1/service_hooks/models.py b/azure-devops/azure/devops/v5_1/service_hooks/models.py
index e10f5139..f568d0f1 100644
--- a/azure-devops/azure/devops/v5_1/service_hooks/models.py
+++ b/azure-devops/azure/devops/v5_1/service_hooks/models.py
@@ -460,21 +460,21 @@ def __init__(self, case_sensitive=None, input_id=None, input_value=None, operato
 class InputValidation(Model):
     """InputValidation.
 
-    :param data_type:
+    :param data_type: Gets or sets the data data type to validate.
     :type data_type: object
-    :param is_required:
+    :param is_required: Gets or sets if this is a required field.
     :type is_required: bool
-    :param max_length:
+    :param max_length: Gets or sets the maximum length of this descriptor.
     :type max_length: int
-    :param max_value:
+    :param max_value: Gets or sets the minimum value for this descriptor.
     :type max_value: decimal
-    :param min_length:
+    :param min_length: Gets or sets the minimum length of this descriptor.
     :type min_length: int
-    :param min_value:
+    :param min_value: Gets or sets the minimum value for this descriptor.
     :type min_value: decimal
-    :param pattern:
+    :param pattern: Gets or sets the pattern to validate.
     :type pattern: str
-    :param pattern_mismatch_error_message:
+    :param pattern_mismatch_error_message: Gets or sets the error on pattern mismatch.
     :type pattern_mismatch_error_message: str
     """
 
diff --git a/azure-devops/azure/devops/v5_1/task_agent/__init__.py b/azure-devops/azure/devops/v5_1/task_agent/__init__.py
index 1e3e6895..4dd9c007 100644
--- a/azure-devops/azure/devops/v5_1/task_agent/__init__.py
+++ b/azure-devops/azure/devops/v5_1/task_agent/__init__.py
@@ -43,6 +43,8 @@
     'EnvironmentDeploymentExecutionRecord',
     'EnvironmentInstance',
     'EnvironmentReference',
+    'EnvironmentResource',
+    'EnvironmentResourceReference',
     'EnvironmentUpdateParameter',
     'GraphSubjectBase',
     'HelpLink',
@@ -53,8 +55,8 @@
     'InputValue',
     'InputValues',
     'InputValuesError',
-    'KubernetesServiceGroup',
-    'KubernetesServiceGroupCreateParameters',
+    'KubernetesResource',
+    'KubernetesResourceCreateParameters',
     'MarketplacePurchasedLicense',
     'MetricsColumnMetaData',
     'MetricsColumnsHeader',
@@ -77,8 +79,6 @@
     'ServiceEndpointRequest',
     'ServiceEndpointRequestResult',
     'ServiceEndpointType',
-    'ServiceGroup',
-    'ServiceGroupReference',
     'TaskAgent',
     'TaskAgentAuthorization',
     'TaskAgentCloud',
diff --git a/azure-devops/azure/devops/v5_1/task_agent/models.py b/azure-devops/azure/devops/v5_1/task_agent/models.py
index 5c302d38..86dc5ffd 100644
--- a/azure-devops/azure/devops/v5_1/task_agent/models.py
+++ b/azure-devops/azure/devops/v5_1/task_agent/models.py
@@ -588,21 +588,25 @@ class DeploymentPoolSummary(Model):
     :type online_agents_count: int
     :param pool: Deployment pool.
     :type pool: :class:`TaskAgentPoolReference <azure.devops.v5_1.task_agent.models.TaskAgentPoolReference>`
+    :param resource: Virtual machine Resource referring in pool.
+    :type resource: :class:`EnvironmentResourceReference <azure.devops.v5_1.task_agent.models.EnvironmentResourceReference>`
     """
 
     _attribute_map = {
         'deployment_groups': {'key': 'deploymentGroups', 'type': '[DeploymentGroupReference]'},
         'offline_agents_count': {'key': 'offlineAgentsCount', 'type': 'int'},
         'online_agents_count': {'key': 'onlineAgentsCount', 'type': 'int'},
-        'pool': {'key': 'pool', 'type': 'TaskAgentPoolReference'}
+        'pool': {'key': 'pool', 'type': 'TaskAgentPoolReference'},
+        'resource': {'key': 'resource', 'type': 'EnvironmentResourceReference'}
     }
 
-    def __init__(self, deployment_groups=None, offline_agents_count=None, online_agents_count=None, pool=None):
+    def __init__(self, deployment_groups=None, offline_agents_count=None, online_agents_count=None, pool=None, resource=None):
         super(DeploymentPoolSummary, self).__init__()
         self.deployment_groups = deployment_groups
         self.offline_agents_count = offline_agents_count
         self.online_agents_count = online_agents_count
         self.pool = pool
+        self.resource = resource
 
 
 class DeploymentTargetUpdateParameter(Model):
@@ -718,12 +722,12 @@ class EnvironmentDeploymentExecutionRecord(Model):
     :type queue_time: datetime
     :param request_identifier: Request identifier of the Environment deployment execution history record
     :type request_identifier: str
+    :param resource_id: Resource Id
+    :type resource_id: int
     :param result: Result of the environment deployment execution
     :type result: object
     :param scope_id: Project Id
     :type scope_id: str
-    :param service_group_id: Service group Id
-    :type service_group_id: int
     :param service_owner: Service owner Id
     :type service_owner: str
     :param start_time: Start time of the environment deployment execution
@@ -740,14 +744,14 @@ class EnvironmentDeploymentExecutionRecord(Model):
         'plan_type': {'key': 'planType', 'type': 'str'},
         'queue_time': {'key': 'queueTime', 'type': 'iso-8601'},
         'request_identifier': {'key': 'requestIdentifier', 'type': 'str'},
+        'resource_id': {'key': 'resourceId', 'type': 'int'},
         'result': {'key': 'result', 'type': 'object'},
         'scope_id': {'key': 'scopeId', 'type': 'str'},
-        'service_group_id': {'key': 'serviceGroupId', 'type': 'int'},
         'service_owner': {'key': 'serviceOwner', 'type': 'str'},
         'start_time': {'key': 'startTime', 'type': 'iso-8601'}
     }
 
-    def __init__(self, definition=None, environment_id=None, finish_time=None, id=None, owner=None, plan_id=None, plan_type=None, queue_time=None, request_identifier=None, result=None, scope_id=None, service_group_id=None, service_owner=None, start_time=None):
+    def __init__(self, definition=None, environment_id=None, finish_time=None, id=None, owner=None, plan_id=None, plan_type=None, queue_time=None, request_identifier=None, resource_id=None, result=None, scope_id=None, service_owner=None, start_time=None):
         super(EnvironmentDeploymentExecutionRecord, self).__init__()
         self.definition = definition
         self.environment_id = environment_id
@@ -758,9 +762,9 @@ def __init__(self, definition=None, environment_id=None, finish_time=None, id=No
         self.plan_type = plan_type
         self.queue_time = queue_time
         self.request_identifier = request_identifier
+        self.resource_id = resource_id
         self.result = result
         self.scope_id = scope_id
-        self.service_group_id = service_group_id
         self.service_owner = service_owner
         self.start_time = start_time
 
@@ -782,8 +786,8 @@ class EnvironmentInstance(Model):
     :type last_modified_on: datetime
     :param name: Name of the Environment.
     :type name: str
-    :param service_groups:
-    :type service_groups: list of :class:`ServiceGroupReference <azure.devops.v5_1.task_agent.models.ServiceGroupReference>`
+    :param resources:
+    :type resources: list of :class:`EnvironmentResourceReference <azure.devops.v5_1.task_agent.models.EnvironmentResourceReference>`
     """
 
     _attribute_map = {
@@ -794,10 +798,10 @@ class EnvironmentInstance(Model):
         'last_modified_by': {'key': 'lastModifiedBy', 'type': 'IdentityRef'},
         'last_modified_on': {'key': 'lastModifiedOn', 'type': 'iso-8601'},
         'name': {'key': 'name', 'type': 'str'},
-        'service_groups': {'key': 'serviceGroups', 'type': '[ServiceGroupReference]'}
+        'resources': {'key': 'resources', 'type': '[EnvironmentResourceReference]'}
     }
 
-    def __init__(self, created_by=None, created_on=None, description=None, id=None, last_modified_by=None, last_modified_on=None, name=None, service_groups=None):
+    def __init__(self, created_by=None, created_on=None, description=None, id=None, last_modified_by=None, last_modified_on=None, name=None, resources=None):
         super(EnvironmentInstance, self).__init__()
         self.created_by = created_by
         self.created_on = created_on
@@ -806,7 +810,7 @@ def __init__(self, created_by=None, created_on=None, description=None, id=None,
         self.last_modified_by = last_modified_by
         self.last_modified_on = last_modified_on
         self.name = name
-        self.service_groups = service_groups
+        self.resources = resources
 
 
 class EnvironmentReference(Model):
@@ -829,6 +833,74 @@ def __init__(self, id=None, name=None):
         self.name = name
 
 
+class EnvironmentResource(Model):
+    """EnvironmentResource.
+
+    :param created_by:
+    :type created_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
+    :param created_on:
+    :type created_on: datetime
+    :param environment_reference:
+    :type environment_reference: :class:`EnvironmentReference <azure.devops.v5_1.task_agent.models.EnvironmentReference>`
+    :param id:
+    :type id: int
+    :param last_modified_by:
+    :type last_modified_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
+    :param last_modified_on:
+    :type last_modified_on: datetime
+    :param name:
+    :type name: str
+    :param type: Environment resource type
+    :type type: object
+    """
+
+    _attribute_map = {
+        'created_by': {'key': 'createdBy', 'type': 'IdentityRef'},
+        'created_on': {'key': 'createdOn', 'type': 'iso-8601'},
+        'environment_reference': {'key': 'environmentReference', 'type': 'EnvironmentReference'},
+        'id': {'key': 'id', 'type': 'int'},
+        'last_modified_by': {'key': 'lastModifiedBy', 'type': 'IdentityRef'},
+        'last_modified_on': {'key': 'lastModifiedOn', 'type': 'iso-8601'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'object'}
+    }
+
+    def __init__(self, created_by=None, created_on=None, environment_reference=None, id=None, last_modified_by=None, last_modified_on=None, name=None, type=None):
+        super(EnvironmentResource, self).__init__()
+        self.created_by = created_by
+        self.created_on = created_on
+        self.environment_reference = environment_reference
+        self.id = id
+        self.last_modified_by = last_modified_by
+        self.last_modified_on = last_modified_on
+        self.name = name
+        self.type = type
+
+
+class EnvironmentResourceReference(Model):
+    """EnvironmentResourceReference.
+
+    :param id: Id of the resource.
+    :type id: int
+    :param name: Name of the resource.
+    :type name: str
+    :param type: Type of the resource.
+    :type type: object
+    """
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'int'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'object'}
+    }
+
+    def __init__(self, id=None, name=None, type=None):
+        super(EnvironmentResourceReference, self).__init__()
+        self.id = id
+        self.name = name
+        self.type = type
+
+
 class EnvironmentUpdateParameter(Model):
     """EnvironmentUpdateParameter.
 
@@ -1028,21 +1100,21 @@ def __init__(self, dependency_input_ids=None, description=None, group_name=None,
 class InputValidation(Model):
     """InputValidation.
 
-    :param data_type:
+    :param data_type: Gets or sets the data data type to validate.
     :type data_type: object
-    :param is_required:
+    :param is_required: Gets or sets if this is a required field.
     :type is_required: bool
-    :param max_length:
+    :param max_length: Gets or sets the maximum length of this descriptor.
     :type max_length: int
-    :param max_value:
+    :param max_value: Gets or sets the minimum value for this descriptor.
     :type max_value: decimal
-    :param min_length:
+    :param min_length: Gets or sets the minimum length of this descriptor.
     :type min_length: int
-    :param min_value:
+    :param min_value: Gets or sets the minimum value for this descriptor.
     :type min_value: decimal
-    :param pattern:
+    :param pattern: Gets or sets the pattern to validate.
     :type pattern: str
-    :param pattern_mismatch_error_message:
+    :param pattern_mismatch_error_message: Gets or sets the error on pattern mismatch.
     :type pattern_mismatch_error_message: str
     """
 
@@ -1165,8 +1237,52 @@ def __init__(self, message=None):
         self.message = message
 
 
-class KubernetesServiceGroupCreateParameters(Model):
-    """KubernetesServiceGroupCreateParameters.
+class KubernetesResource(EnvironmentResource):
+    """KubernetesResource.
+
+    :param created_by:
+    :type created_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
+    :param created_on:
+    :type created_on: datetime
+    :param environment_reference:
+    :type environment_reference: :class:`EnvironmentReference <azure.devops.v5_1.task_agent.models.EnvironmentReference>`
+    :param id:
+    :type id: int
+    :param last_modified_by:
+    :type last_modified_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
+    :param last_modified_on:
+    :type last_modified_on: datetime
+    :param name:
+    :type name: str
+    :param type: Environment resource type
+    :type type: object
+    :param namespace:
+    :type namespace: str
+    :param service_endpoint_id:
+    :type service_endpoint_id: str
+    """
+
+    _attribute_map = {
+        'created_by': {'key': 'createdBy', 'type': 'IdentityRef'},
+        'created_on': {'key': 'createdOn', 'type': 'iso-8601'},
+        'environment_reference': {'key': 'environmentReference', 'type': 'EnvironmentReference'},
+        'id': {'key': 'id', 'type': 'int'},
+        'last_modified_by': {'key': 'lastModifiedBy', 'type': 'IdentityRef'},
+        'last_modified_on': {'key': 'lastModifiedOn', 'type': 'iso-8601'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'object'},
+        'namespace': {'key': 'namespace', 'type': 'str'},
+        'service_endpoint_id': {'key': 'serviceEndpointId', 'type': 'str'}
+    }
+
+    def __init__(self, created_by=None, created_on=None, environment_reference=None, id=None, last_modified_by=None, last_modified_on=None, name=None, type=None, namespace=None, service_endpoint_id=None):
+        super(KubernetesResource, self).__init__(created_by=created_by, created_on=created_on, environment_reference=environment_reference, id=id, last_modified_by=last_modified_by, last_modified_on=last_modified_on, name=name, type=type)
+        self.namespace = namespace
+        self.service_endpoint_id = service_endpoint_id
+
+
+class KubernetesResourceCreateParameters(Model):
+    """KubernetesResourceCreateParameters.
 
     :param name:
     :type name: str
@@ -1183,7 +1299,7 @@ class KubernetesServiceGroupCreateParameters(Model):
     }
 
     def __init__(self, name=None, namespace=None, service_endpoint_id=None):
-        super(KubernetesServiceGroupCreateParameters, self).__init__()
+        super(KubernetesResourceCreateParameters, self).__init__()
         self.name = name
         self.namespace = namespace
         self.service_endpoint_id = service_endpoint_id
@@ -1566,6 +1682,8 @@ class ServiceEndpoint(Model):
     :type name: str
     :param operation_status: Error message during creation/deletion of endpoint
     :type operation_status: :class:`object <azure.devops.v5_1.task_agent.models.object>`
+    :param owner: Gets or sets the owner of the endpoint.
+    :type owner: str
     :param readers_group: Gets or sets the identity reference for the readers group of the service endpoint.
     :type readers_group: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
     :param type: Gets or sets the type of the endpoint.
@@ -1586,12 +1704,13 @@ class ServiceEndpoint(Model):
         'is_shared': {'key': 'isShared', 'type': 'bool'},
         'name': {'key': 'name', 'type': 'str'},
         'operation_status': {'key': 'operationStatus', 'type': 'object'},
+        'owner': {'key': 'owner', 'type': 'str'},
         'readers_group': {'key': 'readersGroup', 'type': 'IdentityRef'},
         'type': {'key': 'type', 'type': 'str'},
         'url': {'key': 'url', 'type': 'str'}
     }
 
-    def __init__(self, administrators_group=None, authorization=None, created_by=None, data=None, description=None, group_scope_id=None, id=None, is_ready=None, is_shared=None, name=None, operation_status=None, readers_group=None, type=None, url=None):
+    def __init__(self, administrators_group=None, authorization=None, created_by=None, data=None, description=None, group_scope_id=None, id=None, is_ready=None, is_shared=None, name=None, operation_status=None, owner=None, readers_group=None, type=None, url=None):
         super(ServiceEndpoint, self).__init__()
         self.administrators_group = administrators_group
         self.authorization = authorization
@@ -1604,6 +1723,7 @@ def __init__(self, administrators_group=None, authorization=None, created_by=Non
         self.is_shared = is_shared
         self.name = name
         self.operation_status = operation_status
+        self.owner = owner
         self.readers_group = readers_group
         self.type = type
         self.url = url
@@ -1861,82 +1981,14 @@ def __init__(self, authentication_schemes=None, data_sources=None, dependency_da
         self.ui_contribution_id = ui_contribution_id
 
 
-class ServiceGroup(Model):
-    """ServiceGroup.
-
-    :param created_by:
-    :type created_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
-    :param created_on:
-    :type created_on: datetime
-    :param environment_reference:
-    :type environment_reference: :class:`EnvironmentReference <azure.devops.v5_1.task_agent.models.EnvironmentReference>`
-    :param id:
-    :type id: int
-    :param last_modified_by:
-    :type last_modified_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
-    :param last_modified_on:
-    :type last_modified_on: datetime
-    :param name:
-    :type name: str
-    :param type:
-    :type type: object
-    """
-
-    _attribute_map = {
-        'created_by': {'key': 'createdBy', 'type': 'IdentityRef'},
-        'created_on': {'key': 'createdOn', 'type': 'iso-8601'},
-        'environment_reference': {'key': 'environmentReference', 'type': 'EnvironmentReference'},
-        'id': {'key': 'id', 'type': 'int'},
-        'last_modified_by': {'key': 'lastModifiedBy', 'type': 'IdentityRef'},
-        'last_modified_on': {'key': 'lastModifiedOn', 'type': 'iso-8601'},
-        'name': {'key': 'name', 'type': 'str'},
-        'type': {'key': 'type', 'type': 'object'}
-    }
-
-    def __init__(self, created_by=None, created_on=None, environment_reference=None, id=None, last_modified_by=None, last_modified_on=None, name=None, type=None):
-        super(ServiceGroup, self).__init__()
-        self.created_by = created_by
-        self.created_on = created_on
-        self.environment_reference = environment_reference
-        self.id = id
-        self.last_modified_by = last_modified_by
-        self.last_modified_on = last_modified_on
-        self.name = name
-        self.type = type
-
-
-class ServiceGroupReference(Model):
-    """ServiceGroupReference.
-
-    :param id: Id of the Service Group.
-    :type id: int
-    :param name: Name of the service group.
-    :type name: str
-    :param type: Type of the service group.
-    :type type: object
-    """
-
-    _attribute_map = {
-        'id': {'key': 'id', 'type': 'int'},
-        'name': {'key': 'name', 'type': 'str'},
-        'type': {'key': 'type', 'type': 'object'}
-    }
-
-    def __init__(self, id=None, name=None, type=None):
-        super(ServiceGroupReference, self).__init__()
-        self.id = id
-        self.name = name
-        self.type = type
-
-
 class TaskAgentAuthorization(Model):
     """TaskAgentAuthorization.
 
-    :param authorization_url: Gets or sets the endpoint used to obtain access tokens from the configured token service.
+    :param authorization_url: Endpoint used to obtain access tokens from the configured token service.
     :type authorization_url: str
-    :param client_id: Gets or sets the client identifier for this agent.
+    :param client_id: Client identifier for this agent.
     :type client_id: str
-    :param public_key: Gets or sets the public key used to verify the identity of this agent.
+    :param public_key: Public key used to verify the identity of this agent.
     :type public_key: :class:`TaskAgentPublicKey <azure.devops.v5_1.task_agent.models.TaskAgentPublicKey>`
     """
 
@@ -1962,12 +2014,18 @@ class TaskAgentCloud(Model):
     :type acquisition_timeout: int
     :param agent_cloud_id:
     :type agent_cloud_id: int
+    :param get_account_parallelism_endpoint:
+    :type get_account_parallelism_endpoint: str
     :param get_agent_definition_endpoint:
     :type get_agent_definition_endpoint: str
     :param get_agent_request_status_endpoint:
     :type get_agent_request_status_endpoint: str
+    :param id:
+    :type id: str
     :param internal: Signifies that this Agent Cloud is internal and should not be user-manageable
     :type internal: bool
+    :param max_parallelism:
+    :type max_parallelism: int
     :param name:
     :type name: str
     :param release_agent_endpoint:
@@ -1982,23 +2040,29 @@ class TaskAgentCloud(Model):
         'acquire_agent_endpoint': {'key': 'acquireAgentEndpoint', 'type': 'str'},
         'acquisition_timeout': {'key': 'acquisitionTimeout', 'type': 'int'},
         'agent_cloud_id': {'key': 'agentCloudId', 'type': 'int'},
+        'get_account_parallelism_endpoint': {'key': 'getAccountParallelismEndpoint', 'type': 'str'},
         'get_agent_definition_endpoint': {'key': 'getAgentDefinitionEndpoint', 'type': 'str'},
         'get_agent_request_status_endpoint': {'key': 'getAgentRequestStatusEndpoint', 'type': 'str'},
+        'id': {'key': 'id', 'type': 'str'},
         'internal': {'key': 'internal', 'type': 'bool'},
+        'max_parallelism': {'key': 'maxParallelism', 'type': 'int'},
         'name': {'key': 'name', 'type': 'str'},
         'release_agent_endpoint': {'key': 'releaseAgentEndpoint', 'type': 'str'},
         'shared_secret': {'key': 'sharedSecret', 'type': 'str'},
         'type': {'key': 'type', 'type': 'str'}
     }
 
-    def __init__(self, acquire_agent_endpoint=None, acquisition_timeout=None, agent_cloud_id=None, get_agent_definition_endpoint=None, get_agent_request_status_endpoint=None, internal=None, name=None, release_agent_endpoint=None, shared_secret=None, type=None):
+    def __init__(self, acquire_agent_endpoint=None, acquisition_timeout=None, agent_cloud_id=None, get_account_parallelism_endpoint=None, get_agent_definition_endpoint=None, get_agent_request_status_endpoint=None, id=None, internal=None, max_parallelism=None, name=None, release_agent_endpoint=None, shared_secret=None, type=None):
         super(TaskAgentCloud, self).__init__()
         self.acquire_agent_endpoint = acquire_agent_endpoint
         self.acquisition_timeout = acquisition_timeout
         self.agent_cloud_id = agent_cloud_id
+        self.get_account_parallelism_endpoint = get_account_parallelism_endpoint
         self.get_agent_definition_endpoint = get_agent_definition_endpoint
         self.get_agent_request_status_endpoint = get_agent_request_status_endpoint
+        self.id = id
         self.internal = internal
+        self.max_parallelism = max_parallelism
         self.name = name
         self.release_agent_endpoint = release_agent_endpoint
         self.shared_secret = shared_secret
@@ -2108,25 +2172,25 @@ class TaskAgentJobRequest(Model):
     :type agent_delays: list of :class:`TaskAgentDelaySource <azure.devops.v5_1.task_agent.models.TaskAgentDelaySource>`
     :param agent_specification:
     :type agent_specification: :class:`object <azure.devops.v5_1.task_agent.models.object>`
-    :param assign_time:
+    :param assign_time: The date/time this request was assigned.
     :type assign_time: datetime
-    :param data:
+    :param data: Additional data about the request.
     :type data: dict
-    :param definition:
+    :param definition: The pipeline definition associated with this request
     :type definition: :class:`TaskOrchestrationOwner <azure.devops.v5_1.task_agent.models.TaskOrchestrationOwner>`
-    :param demands:
+    :param demands: A list of demands required to fulfill this request.
     :type demands: list of :class:`object <azure.devops.v5_1.task_agent.models.object>`
     :param expected_duration:
     :type expected_duration: object
-    :param finish_time:
+    :param finish_time: The date/time this request was finished.
     :type finish_time: datetime
-    :param host_id:
+    :param host_id: The host which triggered this request.
     :type host_id: str
-    :param job_id:
+    :param job_id: ID of the job resulting from this request.
     :type job_id: str
-    :param job_name:
+    :param job_name: Name of the job resulting from this request.
     :type job_name: str
-    :param locked_until:
+    :param locked_until: The deadline for the agent to renew the lock.
     :type locked_until: datetime
     :param matched_agents:
     :type matched_agents: list of :class:`TaskAgentReference <azure.devops.v5_1.task_agent.models.TaskAgentReference>`
@@ -2134,31 +2198,31 @@ class TaskAgentJobRequest(Model):
     :type matches_all_agents_in_pool: bool
     :param orchestration_id:
     :type orchestration_id: str
-    :param owner:
+    :param owner: The pipeline associated with this request
     :type owner: :class:`TaskOrchestrationOwner <azure.devops.v5_1.task_agent.models.TaskOrchestrationOwner>`
     :param plan_group:
     :type plan_group: str
-    :param plan_id:
+    :param plan_id: Internal ID for the orchestration plan connected with this request.
     :type plan_id: str
-    :param plan_type:
+    :param plan_type: Internal detail representing the type of orchestration plan.
     :type plan_type: str
-    :param pool_id:
+    :param pool_id: The ID of the pool this request targets
     :type pool_id: int
-    :param queue_id:
+    :param queue_id: The ID of the queue this request targets
     :type queue_id: int
-    :param queue_time:
+    :param queue_time: The date/time this request was queued.
     :type queue_time: datetime
-    :param receive_time:
+    :param receive_time: The date/time this request was receieved by an agent.
     :type receive_time: datetime
-    :param request_id:
+    :param request_id: ID of the request.
     :type request_id: long
-    :param reserved_agent:
+    :param reserved_agent: The agent allocated for this request.
     :type reserved_agent: :class:`TaskAgentReference <azure.devops.v5_1.task_agent.models.TaskAgentReference>`
-    :param result:
+    :param result: The result of this request.
     :type result: object
-    :param scope_id:
+    :param scope_id: Scope of the pipeline; matches the project ID.
     :type scope_id: str
-    :param service_owner:
+    :param service_owner: The service which owns this request.
     :type service_owner: str
     :param status_message:
     :type status_message: str
@@ -2520,13 +2584,13 @@ def __init__(self, exponent=None, modulus=None):
 class TaskAgentQueue(Model):
     """TaskAgentQueue.
 
-    :param id: Id of the queue
+    :param id: ID of the queue
     :type id: int
     :param name: Name of the queue
     :type name: str
     :param pool: Pool reference for this queue
     :type pool: :class:`TaskAgentPoolReference <azure.devops.v5_1.task_agent.models.TaskAgentPoolReference>`
-    :param project_id: Project Id
+    :param project_id: Project ID
     :type project_id: str
     """
 
@@ -2550,21 +2614,21 @@ class TaskAgentReference(Model):
 
     :param _links:
     :type _links: :class:`ReferenceLinks <azure.devops.v5_1.task_agent.models.ReferenceLinks>`
-    :param access_point: Gets the access point of the agent.
+    :param access_point: This agent's access point.
     :type access_point: str
-    :param enabled: Gets or sets a value indicating whether or not this agent should be enabled for job execution.
+    :param enabled: Whether or not this agent should run jobs.
     :type enabled: bool
-    :param id: Gets the identifier of the agent.
+    :param id: Identifier of the agent.
     :type id: int
-    :param name: Gets the name of the agent.
+    :param name: Name of the agent.
     :type name: str
-    :param oSDescription: Gets the OS of the agent.
+    :param oSDescription: Agent OS.
     :type oSDescription: str
-    :param provisioning_state: Gets or sets the current provisioning state of this agent
+    :param provisioning_state: Provisioning state of this agent.
     :type provisioning_state: str
-    :param status: Gets the current connectivity status of the agent.
+    :param status: Whether or not the agent is online.
     :type status: object
-    :param version: Gets the version of the agent.
+    :param version: Agent version.
     :type version: str
     """
 
@@ -2648,17 +2712,17 @@ def __init__(self, encrypted=None, value=None):
 class TaskAgentUpdate(Model):
     """TaskAgentUpdate.
 
-    :param current_state: The current state of this agent update
+    :param current_state: Current state of this agent update.
     :type current_state: str
-    :param reason: The reason of this agent update
+    :param reason: Reason for this update.
     :type reason: :class:`TaskAgentUpdateReason <azure.devops.v5_1.task_agent.models.TaskAgentUpdateReason>`
-    :param requested_by: The identity that request the agent update
+    :param requested_by: Identity which requested this update.
     :type requested_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
-    :param request_time: Gets the date on which this agent update was requested.
+    :param request_time: Date on which this update was requested.
     :type request_time: datetime
-    :param source_version: Gets or sets the source agent version of the agent update
+    :param source_version: Source agent version of the update.
     :type source_version: :class:`PackageVersion <azure.devops.v5_1.task_agent.models.PackageVersion>`
-    :param target_version: Gets or sets the target agent version of the agent update
+    :param target_version: Target agent version of the update.
     :type target_version: :class:`PackageVersion <azure.devops.v5_1.task_agent.models.PackageVersion>`
     """
 
@@ -3846,7 +3910,7 @@ def __init__(self, agent=None, id=None, tags=None):
         self.tags = tags
 
 
-class VirtualMachineGroup(ServiceGroup):
+class VirtualMachineGroup(EnvironmentResource):
     """VirtualMachineGroup.
 
     :param created_by:
@@ -3863,7 +3927,7 @@ class VirtualMachineGroup(ServiceGroup):
     :type last_modified_on: datetime
     :param name:
     :type name: str
-    :param type:
+    :param type: Environment resource type
     :type type: object
     :param pool_id:
     :type pool_id: int
@@ -4025,88 +4089,44 @@ def __init__(self, id=None, name=None, pool=None, project=None, machines=None, s
         self.size = size
 
 
-class KubernetesServiceGroup(ServiceGroup):
-    """KubernetesServiceGroup.
-
-    :param created_by:
-    :type created_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
-    :param created_on:
-    :type created_on: datetime
-    :param environment_reference:
-    :type environment_reference: :class:`EnvironmentReference <azure.devops.v5_1.task_agent.models.EnvironmentReference>`
-    :param id:
-    :type id: int
-    :param last_modified_by:
-    :type last_modified_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
-    :param last_modified_on:
-    :type last_modified_on: datetime
-    :param name:
-    :type name: str
-    :param type:
-    :type type: object
-    :param namespace:
-    :type namespace: str
-    :param service_endpoint_id:
-    :type service_endpoint_id: str
-    """
-
-    _attribute_map = {
-        'created_by': {'key': 'createdBy', 'type': 'IdentityRef'},
-        'created_on': {'key': 'createdOn', 'type': 'iso-8601'},
-        'environment_reference': {'key': 'environmentReference', 'type': 'EnvironmentReference'},
-        'id': {'key': 'id', 'type': 'int'},
-        'last_modified_by': {'key': 'lastModifiedBy', 'type': 'IdentityRef'},
-        'last_modified_on': {'key': 'lastModifiedOn', 'type': 'iso-8601'},
-        'name': {'key': 'name', 'type': 'str'},
-        'type': {'key': 'type', 'type': 'object'},
-        'namespace': {'key': 'namespace', 'type': 'str'},
-        'service_endpoint_id': {'key': 'serviceEndpointId', 'type': 'str'}
-    }
-
-    def __init__(self, created_by=None, created_on=None, environment_reference=None, id=None, last_modified_by=None, last_modified_on=None, name=None, type=None, namespace=None, service_endpoint_id=None):
-        super(KubernetesServiceGroup, self).__init__(created_by=created_by, created_on=created_on, environment_reference=environment_reference, id=id, last_modified_by=last_modified_by, last_modified_on=last_modified_on, name=name, type=type)
-        self.namespace = namespace
-        self.service_endpoint_id = service_endpoint_id
-
-
 class TaskAgent(TaskAgentReference):
     """TaskAgent.
 
     :param _links:
     :type _links: :class:`ReferenceLinks <azure.devops.v5_1.task_agent.models.ReferenceLinks>`
-    :param access_point: Gets the access point of the agent.
+    :param access_point: This agent's access point.
     :type access_point: str
-    :param enabled: Gets or sets a value indicating whether or not this agent should be enabled for job execution.
+    :param enabled: Whether or not this agent should run jobs.
     :type enabled: bool
-    :param id: Gets the identifier of the agent.
+    :param id: Identifier of the agent.
     :type id: int
-    :param name: Gets the name of the agent.
+    :param name: Name of the agent.
     :type name: str
-    :param oSDescription: Gets the OS of the agent.
+    :param oSDescription: Agent OS.
     :type oSDescription: str
-    :param provisioning_state: Gets or sets the current provisioning state of this agent
+    :param provisioning_state: Provisioning state of this agent.
     :type provisioning_state: str
-    :param status: Gets the current connectivity status of the agent.
+    :param status: Whether or not the agent is online.
     :type status: object
-    :param version: Gets the version of the agent.
+    :param version: Agent version.
     :type version: str
-    :param assigned_agent_cloud_request: Gets the Agent Cloud Request that's currently associated with this agent
+    :param assigned_agent_cloud_request: The agent cloud request that's currently associated with this agent.
     :type assigned_agent_cloud_request: :class:`TaskAgentCloudRequest <azure.devops.v5_1.task_agent.models.TaskAgentCloudRequest>`
-    :param assigned_request: Gets the request which is currently assigned to this agent.
+    :param assigned_request: The request which is currently assigned to this agent.
     :type assigned_request: :class:`TaskAgentJobRequest <azure.devops.v5_1.task_agent.models.TaskAgentJobRequest>`
-    :param authorization: Gets or sets the authorization information for this agent.
+    :param authorization: Authorization information for this agent.
     :type authorization: :class:`TaskAgentAuthorization <azure.devops.v5_1.task_agent.models.TaskAgentAuthorization>`
-    :param created_on: Gets the date on which this agent was created.
+    :param created_on: Date on which this agent was created.
     :type created_on: datetime
-    :param last_completed_request: Gets the last request which was completed by this agent.
+    :param last_completed_request: The last request which was completed by this agent.
     :type last_completed_request: :class:`TaskAgentJobRequest <azure.devops.v5_1.task_agent.models.TaskAgentJobRequest>`
-    :param max_parallelism: Gets or sets the maximum job parallelism allowed on this host.
+    :param max_parallelism: Maximum job parallelism allowed for this agent.
     :type max_parallelism: int
-    :param pending_update: Gets the pending update for this agent.
+    :param pending_update: Pending update for this agent.
     :type pending_update: :class:`TaskAgentUpdate <azure.devops.v5_1.task_agent.models.TaskAgentUpdate>`
     :param properties:
     :type properties: :class:`object <azure.devops.v5_1.task_agent.models.object>`
-    :param status_changed_on: Gets the date on which the last connectivity status change occurred.
+    :param status_changed_on: Date on which the last connectivity status change occurred.
     :type status_changed_on: datetime
     :param system_capabilities:
     :type system_capabilities: dict
@@ -4167,21 +4187,21 @@ class TaskAgentPool(TaskAgentPoolReference):
     :type scope: str
     :param size: Gets the current size of the pool.
     :type size: int
-    :param agent_cloud_id: Gets or sets an agentCloudId
+    :param agent_cloud_id: The ID of the associated agent cloud.
     :type agent_cloud_id: int
-    :param auto_provision: Gets or sets a value indicating whether or not a queue should be automatically provisioned for each project collection or not.
+    :param auto_provision: Whether or not a queue should be automatically provisioned for each project collection.
     :type auto_provision: bool
-    :param auto_size: Gets or sets a value indicating whether or not the pool should autosize itself based on the Agent Cloud Provider settings
+    :param auto_size: Whether or not the pool should autosize itself based on the Agent Cloud Provider settings.
     :type auto_size: bool
-    :param created_by: Gets the identity who created this pool. The creator of the pool is automatically added into the administrators group for the pool on creation.
+    :param created_by: Creator of the pool. The creator of the pool is automatically added into the administrators group for the pool on creation.
     :type created_by: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
-    :param created_on: Gets the date/time of the pool creation.
+    :param created_on: The date/time of the pool creation.
     :type created_on: datetime
-    :param owner: Gets the identity who owns or administrates this pool.
+    :param owner: Owner or administrator of the pool.
     :type owner: :class:`IdentityRef <azure.devops.v5_1.task_agent.models.IdentityRef>`
     :param properties:
     :type properties: :class:`object <azure.devops.v5_1.task_agent.models.object>`
-    :param target_size: Gets or sets a value indicating target parallelism
+    :param target_size: Target parallelism.
     :type target_size: int
     """
 
@@ -4320,6 +4340,8 @@ def __init__(self, auth_key=None, endpoint=None, key_selector=None, selector=Non
     'EnvironmentDeploymentExecutionRecord',
     'EnvironmentInstance',
     'EnvironmentReference',
+    'EnvironmentResource',
+    'EnvironmentResourceReference',
     'EnvironmentUpdateParameter',
     'GraphSubjectBase',
     'HelpLink',
@@ -4330,7 +4352,8 @@ def __init__(self, auth_key=None, endpoint=None, key_selector=None, selector=Non
     'InputValue',
     'InputValues',
     'InputValuesError',
-    'KubernetesServiceGroupCreateParameters',
+    'KubernetesResource',
+    'KubernetesResourceCreateParameters',
     'MarketplacePurchasedLicense',
     'MetricsColumnMetaData',
     'MetricsColumnsHeader',
@@ -4353,8 +4376,6 @@ def __init__(self, auth_key=None, endpoint=None, key_selector=None, selector=Non
     'ServiceEndpointRequest',
     'ServiceEndpointRequestResult',
     'ServiceEndpointType',
-    'ServiceGroup',
-    'ServiceGroupReference',
     'TaskAgentAuthorization',
     'TaskAgentCloud',
     'TaskAgentCloudRequest',
@@ -4406,7 +4427,6 @@ def __init__(self, auth_key=None, endpoint=None, key_selector=None, selector=Non
     'DataSourceBinding',
     'DeploymentGroup',
     'DeploymentMachineGroup',
-    'KubernetesServiceGroup',
     'TaskAgent',
     'TaskAgentPool',
     'TaskInputDefinition',
diff --git a/azure-devops/azure/devops/v5_1/task_agent/task_agent_client.py b/azure-devops/azure/devops/v5_1/task_agent/task_agent_client.py
index f9baba83..9163868b 100644
--- a/azure-devops/azure/devops/v5_1/task_agent/task_agent_client.py
+++ b/azure-devops/azure/devops/v5_1/task_agent/task_agent_client.py
@@ -88,6 +88,146 @@ def get_agent_cloud_types(self):
                               version='5.1-preview.1')
         return self._deserialize('[TaskAgentCloudType]', self._unwrap_collection(response))
 
+    def add_agent(self, agent, pool_id):
+        """AddAgent.
+        [Preview API] Adds an agent to a pool.  You probably don't want to call this endpoint directly. Instead, [configure an agent](https://docs.microsoft.com/azure/devops/pipelines/agents/agents) using the agent download package.
+        :param :class:`<TaskAgent> <azure.devops.v5_1.task_agent.models.TaskAgent>` agent: Details about the agent being added
+        :param int pool_id: The agent pool in which to add the agent
+        :rtype: :class:`<TaskAgent> <azure.devops.v5_1.task-agent.models.TaskAgent>`
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        content = self._serialize.body(agent, 'TaskAgent')
+        response = self._send(http_method='POST',
+                              location_id='e298ef32-5878-4cab-993c-043836571f42',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              content=content)
+        return self._deserialize('TaskAgent', response)
+
+    def delete_agent(self, pool_id, agent_id):
+        """DeleteAgent.
+        [Preview API] Delete an agent.  You probably don't want to call this endpoint directly. Instead, [use the agent configuration script](https://docs.microsoft.com/azure/devops/pipelines/agents/agents) to remove an agent from your organization.
+        :param int pool_id: The pool ID to remove the agent from
+        :param int agent_id: The agent ID to remove
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        if agent_id is not None:
+            route_values['agentId'] = self._serialize.url('agent_id', agent_id, 'int')
+        self._send(http_method='DELETE',
+                   location_id='e298ef32-5878-4cab-993c-043836571f42',
+                   version='5.1-preview.1',
+                   route_values=route_values)
+
+    def get_agent(self, pool_id, agent_id, include_capabilities=None, include_assigned_request=None, property_filters=None):
+        """GetAgent.
+        [Preview API] Get information about an agent.
+        :param int pool_id: The agent pool containing the agent
+        :param int agent_id: The agent ID to get information about
+        :param bool include_capabilities: Whether to include the agent's capabilities in the response
+        :param bool include_assigned_request: Whether to include details about the agent's current work
+        :param [str] property_filters: Filter which custom properties will be returned
+        :rtype: :class:`<TaskAgent> <azure.devops.v5_1.task-agent.models.TaskAgent>`
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        if agent_id is not None:
+            route_values['agentId'] = self._serialize.url('agent_id', agent_id, 'int')
+        query_parameters = {}
+        if include_capabilities is not None:
+            query_parameters['includeCapabilities'] = self._serialize.query('include_capabilities', include_capabilities, 'bool')
+        if include_assigned_request is not None:
+            query_parameters['includeAssignedRequest'] = self._serialize.query('include_assigned_request', include_assigned_request, 'bool')
+        if property_filters is not None:
+            property_filters = ",".join(property_filters)
+            query_parameters['propertyFilters'] = self._serialize.query('property_filters', property_filters, 'str')
+        response = self._send(http_method='GET',
+                              location_id='e298ef32-5878-4cab-993c-043836571f42',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('TaskAgent', response)
+
+    def get_agents(self, pool_id, agent_name=None, include_capabilities=None, include_assigned_request=None, property_filters=None, demands=None):
+        """GetAgents.
+        [Preview API] Get a list of agents.
+        :param int pool_id: The agent pool containing the agents
+        :param str agent_name: Filter on agent name
+        :param bool include_capabilities: Whether to include the agents' capabilities in the response
+        :param bool include_assigned_request: Whether to include details about the agents' current work
+        :param [str] property_filters: Filter which custom properties will be returned
+        :param [str] demands: Filter by demands the agents can satisfy
+        :rtype: [TaskAgent]
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        query_parameters = {}
+        if agent_name is not None:
+            query_parameters['agentName'] = self._serialize.query('agent_name', agent_name, 'str')
+        if include_capabilities is not None:
+            query_parameters['includeCapabilities'] = self._serialize.query('include_capabilities', include_capabilities, 'bool')
+        if include_assigned_request is not None:
+            query_parameters['includeAssignedRequest'] = self._serialize.query('include_assigned_request', include_assigned_request, 'bool')
+        if property_filters is not None:
+            property_filters = ",".join(property_filters)
+            query_parameters['propertyFilters'] = self._serialize.query('property_filters', property_filters, 'str')
+        if demands is not None:
+            demands = ",".join(demands)
+            query_parameters['demands'] = self._serialize.query('demands', demands, 'str')
+        response = self._send(http_method='GET',
+                              location_id='e298ef32-5878-4cab-993c-043836571f42',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('[TaskAgent]', self._unwrap_collection(response))
+
+    def replace_agent(self, agent, pool_id, agent_id):
+        """ReplaceAgent.
+        [Preview API] Replace an agent.  You probably don't want to call this endpoint directly. Instead, [use the agent configuration script](https://docs.microsoft.com/azure/devops/pipelines/agents/agents) to remove and reconfigure an agent from your organization.
+        :param :class:`<TaskAgent> <azure.devops.v5_1.task_agent.models.TaskAgent>` agent: Updated details about the replacing agent
+        :param int pool_id: The agent pool to use
+        :param int agent_id: The agent to replace
+        :rtype: :class:`<TaskAgent> <azure.devops.v5_1.task-agent.models.TaskAgent>`
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        if agent_id is not None:
+            route_values['agentId'] = self._serialize.url('agent_id', agent_id, 'int')
+        content = self._serialize.body(agent, 'TaskAgent')
+        response = self._send(http_method='PUT',
+                              location_id='e298ef32-5878-4cab-993c-043836571f42',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              content=content)
+        return self._deserialize('TaskAgent', response)
+
+    def update_agent(self, agent, pool_id, agent_id):
+        """UpdateAgent.
+        [Preview API] Update agent details.
+        :param :class:`<TaskAgent> <azure.devops.v5_1.task_agent.models.TaskAgent>` agent: Updated details about the agent
+        :param int pool_id: The agent pool to use
+        :param int agent_id: The agent to update
+        :rtype: :class:`<TaskAgent> <azure.devops.v5_1.task-agent.models.TaskAgent>`
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        if agent_id is not None:
+            route_values['agentId'] = self._serialize.url('agent_id', agent_id, 'int')
+        content = self._serialize.body(agent, 'TaskAgent')
+        response = self._send(http_method='PATCH',
+                              location_id='e298ef32-5878-4cab-993c-043836571f42',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              content=content)
+        return self._deserialize('TaskAgent', response)
+
     def add_deployment_group(self, deployment_group, project):
         """AddDeploymentGroup.
         [Preview API] Create a deployment group.
@@ -205,6 +345,232 @@ def update_deployment_group(self, deployment_group, project, deployment_group_id
                               content=content)
         return self._deserialize('DeploymentGroup', response)
 
+    def add_agent_pool(self, pool):
+        """AddAgentPool.
+        [Preview API] Create an agent pool.
+        :param :class:`<TaskAgentPool> <azure.devops.v5_1.task_agent.models.TaskAgentPool>` pool: Details about the new agent pool
+        :rtype: :class:`<TaskAgentPool> <azure.devops.v5_1.task-agent.models.TaskAgentPool>`
+        """
+        content = self._serialize.body(pool, 'TaskAgentPool')
+        response = self._send(http_method='POST',
+                              location_id='a8c47e17-4d56-4a56-92bb-de7ea7dc65be',
+                              version='5.1-preview.1',
+                              content=content)
+        return self._deserialize('TaskAgentPool', response)
+
+    def delete_agent_pool(self, pool_id):
+        """DeleteAgentPool.
+        [Preview API] Delete an agent pool.
+        :param int pool_id: ID of the agent pool to delete
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        self._send(http_method='DELETE',
+                   location_id='a8c47e17-4d56-4a56-92bb-de7ea7dc65be',
+                   version='5.1-preview.1',
+                   route_values=route_values)
+
+    def get_agent_pool(self, pool_id, properties=None, action_filter=None):
+        """GetAgentPool.
+        [Preview API] Get information about an agent pool.
+        :param int pool_id: An agent pool ID
+        :param [str] properties: Agent pool properties (comma-separated)
+        :param str action_filter: Filter by whether the calling user has use or manage permissions
+        :rtype: :class:`<TaskAgentPool> <azure.devops.v5_1.task-agent.models.TaskAgentPool>`
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        query_parameters = {}
+        if properties is not None:
+            properties = ",".join(properties)
+            query_parameters['properties'] = self._serialize.query('properties', properties, 'str')
+        if action_filter is not None:
+            query_parameters['actionFilter'] = self._serialize.query('action_filter', action_filter, 'str')
+        response = self._send(http_method='GET',
+                              location_id='a8c47e17-4d56-4a56-92bb-de7ea7dc65be',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('TaskAgentPool', response)
+
+    def get_agent_pools(self, pool_name=None, properties=None, pool_type=None, action_filter=None):
+        """GetAgentPools.
+        [Preview API] Get a list of agent pools.
+        :param str pool_name: Filter by name
+        :param [str] properties: Filter by agent pool properties (comma-separated)
+        :param str pool_type: Filter by pool type
+        :param str action_filter: Filter by whether the calling user has use or manage permissions
+        :rtype: [TaskAgentPool]
+        """
+        query_parameters = {}
+        if pool_name is not None:
+            query_parameters['poolName'] = self._serialize.query('pool_name', pool_name, 'str')
+        if properties is not None:
+            properties = ",".join(properties)
+            query_parameters['properties'] = self._serialize.query('properties', properties, 'str')
+        if pool_type is not None:
+            query_parameters['poolType'] = self._serialize.query('pool_type', pool_type, 'str')
+        if action_filter is not None:
+            query_parameters['actionFilter'] = self._serialize.query('action_filter', action_filter, 'str')
+        response = self._send(http_method='GET',
+                              location_id='a8c47e17-4d56-4a56-92bb-de7ea7dc65be',
+                              version='5.1-preview.1',
+                              query_parameters=query_parameters)
+        return self._deserialize('[TaskAgentPool]', self._unwrap_collection(response))
+
+    def update_agent_pool(self, pool, pool_id):
+        """UpdateAgentPool.
+        [Preview API] Update properties on an agent pool
+        :param :class:`<TaskAgentPool> <azure.devops.v5_1.task_agent.models.TaskAgentPool>` pool: Updated agent pool details
+        :param int pool_id: The agent pool to update
+        :rtype: :class:`<TaskAgentPool> <azure.devops.v5_1.task-agent.models.TaskAgentPool>`
+        """
+        route_values = {}
+        if pool_id is not None:
+            route_values['poolId'] = self._serialize.url('pool_id', pool_id, 'int')
+        content = self._serialize.body(pool, 'TaskAgentPool')
+        response = self._send(http_method='PATCH',
+                              location_id='a8c47e17-4d56-4a56-92bb-de7ea7dc65be',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              content=content)
+        return self._deserialize('TaskAgentPool', response)
+
+    def add_agent_queue(self, queue, project=None, authorize_pipelines=None):
+        """AddAgentQueue.
+        [Preview API] Create a new agent queue to connect a project to an agent pool.
+        :param :class:`<TaskAgentQueue> <azure.devops.v5_1.task_agent.models.TaskAgentQueue>` queue: Details about the queue to create
+        :param str project: Project ID or project name
+        :param bool authorize_pipelines: Automatically authorize this queue when using YAML
+        :rtype: :class:`<TaskAgentQueue> <azure.devops.v5_1.task-agent.models.TaskAgentQueue>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if authorize_pipelines is not None:
+            query_parameters['authorizePipelines'] = self._serialize.query('authorize_pipelines', authorize_pipelines, 'bool')
+        content = self._serialize.body(queue, 'TaskAgentQueue')
+        response = self._send(http_method='POST',
+                              location_id='900fa995-c559-4923-aae7-f8424fe4fbea',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters,
+                              content=content)
+        return self._deserialize('TaskAgentQueue', response)
+
+    def delete_agent_queue(self, queue_id, project=None):
+        """DeleteAgentQueue.
+        [Preview API] Removes an agent queue from a project.
+        :param int queue_id: The agent queue to remove
+        :param str project: Project ID or project name
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if queue_id is not None:
+            route_values['queueId'] = self._serialize.url('queue_id', queue_id, 'int')
+        self._send(http_method='DELETE',
+                   location_id='900fa995-c559-4923-aae7-f8424fe4fbea',
+                   version='5.1-preview.1',
+                   route_values=route_values)
+
+    def get_agent_queue(self, queue_id, project=None, action_filter=None):
+        """GetAgentQueue.
+        [Preview API] Get information about an agent queue.
+        :param int queue_id: The agent queue to get information about
+        :param str project: Project ID or project name
+        :param str action_filter: Filter by whether the calling user has use or manage permissions
+        :rtype: :class:`<TaskAgentQueue> <azure.devops.v5_1.task-agent.models.TaskAgentQueue>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if queue_id is not None:
+            route_values['queueId'] = self._serialize.url('queue_id', queue_id, 'int')
+        query_parameters = {}
+        if action_filter is not None:
+            query_parameters['actionFilter'] = self._serialize.query('action_filter', action_filter, 'str')
+        response = self._send(http_method='GET',
+                              location_id='900fa995-c559-4923-aae7-f8424fe4fbea',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('TaskAgentQueue', response)
+
+    def get_agent_queues(self, project=None, queue_name=None, action_filter=None):
+        """GetAgentQueues.
+        [Preview API] Get a list of agent queues.
+        :param str project: Project ID or project name
+        :param str queue_name: Filter on the agent queue name
+        :param str action_filter: Filter by whether the calling user has use or manage permissions
+        :rtype: [TaskAgentQueue]
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if queue_name is not None:
+            query_parameters['queueName'] = self._serialize.query('queue_name', queue_name, 'str')
+        if action_filter is not None:
+            query_parameters['actionFilter'] = self._serialize.query('action_filter', action_filter, 'str')
+        response = self._send(http_method='GET',
+                              location_id='900fa995-c559-4923-aae7-f8424fe4fbea',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('[TaskAgentQueue]', self._unwrap_collection(response))
+
+    def get_agent_queues_by_ids(self, queue_ids, project=None, action_filter=None):
+        """GetAgentQueuesByIds.
+        [Preview API] Get a list of agent queues by their IDs
+        :param [int] queue_ids: A comma-separated list of agent queue IDs to retrieve
+        :param str project: Project ID or project name
+        :param str action_filter: Filter by whether the calling user has use or manage permissions
+        :rtype: [TaskAgentQueue]
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if queue_ids is not None:
+            queue_ids = ",".join(map(str, queue_ids))
+            query_parameters['queueIds'] = self._serialize.query('queue_ids', queue_ids, 'str')
+        if action_filter is not None:
+            query_parameters['actionFilter'] = self._serialize.query('action_filter', action_filter, 'str')
+        response = self._send(http_method='GET',
+                              location_id='900fa995-c559-4923-aae7-f8424fe4fbea',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('[TaskAgentQueue]', self._unwrap_collection(response))
+
+    def get_agent_queues_by_names(self, queue_names, project=None, action_filter=None):
+        """GetAgentQueuesByNames.
+        [Preview API] Get a list of agent queues by their names
+        :param [str] queue_names: A comma-separated list of agent names to retrieve
+        :param str project: Project ID or project name
+        :param str action_filter: Filter by whether the calling user has use or manage permissions
+        :rtype: [TaskAgentQueue]
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if queue_names is not None:
+            queue_names = ",".join(queue_names)
+            query_parameters['queueNames'] = self._serialize.query('queue_names', queue_names, 'str')
+        if action_filter is not None:
+            query_parameters['actionFilter'] = self._serialize.query('action_filter', action_filter, 'str')
+        response = self._send(http_method='GET',
+                              location_id='900fa995-c559-4923-aae7-f8424fe4fbea',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('[TaskAgentQueue]', self._unwrap_collection(response))
+
     def get_agent_cloud_requests(self, agent_cloud_id):
         """GetAgentCloudRequests.
         [Preview API]
diff --git a/azure-devops/azure/devops/v5_1/test/__init__.py b/azure-devops/azure/devops/v5_1/test/__init__.py
index c481e685..109482fe 100644
--- a/azure-devops/azure/devops/v5_1/test/__init__.py
+++ b/azure-devops/azure/devops/v5_1/test/__init__.py
@@ -78,6 +78,7 @@
     'TestEnvironment',
     'TestFailureDetails',
     'TestFailuresAnalysis',
+    'TestFlakyIdentifier',
     'TestHistoryQuery',
     'TestIterationDetailsModel',
     'TestMessageLogDetails',
@@ -115,6 +116,7 @@
     'TestSuite',
     'TestSuiteCloneRequest',
     'TestSummaryForWorkItem',
+    'TestTag',
     'TestToWorkItemLinks',
     'TestVariable',
     'WorkItemReference',
diff --git a/azure-devops/azure/devops/v5_1/test/models.py b/azure-devops/azure/devops/v5_1/test/models.py
index 8f40f0a7..25a3b1f4 100644
--- a/azure-devops/azure/devops/v5_1/test/models.py
+++ b/azure-devops/azure/devops/v5_1/test/models.py
@@ -226,6 +226,8 @@ class BuildConfiguration(Model):
     :type repository_type: str
     :param source_version:
     :type source_version: str
+    :param target_branch_name:
+    :type target_branch_name: str
     :param uri:
     :type uri: str
     """
@@ -244,10 +246,11 @@ class BuildConfiguration(Model):
         'repository_id': {'key': 'repositoryId', 'type': 'int'},
         'repository_type': {'key': 'repositoryType', 'type': 'str'},
         'source_version': {'key': 'sourceVersion', 'type': 'str'},
+        'target_branch_name': {'key': 'targetBranchName', 'type': 'str'},
         'uri': {'key': 'uri', 'type': 'str'}
     }
 
-    def __init__(self, branch_name=None, build_definition_id=None, build_system=None, creation_date=None, flavor=None, id=None, number=None, platform=None, project=None, repository_guid=None, repository_id=None, repository_type=None, source_version=None, uri=None):
+    def __init__(self, branch_name=None, build_definition_id=None, build_system=None, creation_date=None, flavor=None, id=None, number=None, platform=None, project=None, repository_guid=None, repository_id=None, repository_type=None, source_version=None, target_branch_name=None, uri=None):
         super(BuildConfiguration, self).__init__()
         self.branch_name = branch_name
         self.build_definition_id = build_definition_id
@@ -262,6 +265,7 @@ def __init__(self, branch_name=None, build_definition_id=None, build_system=None
         self.repository_id = repository_id
         self.repository_type = repository_type
         self.source_version = source_version
+        self.target_branch_name = target_branch_name
         self.uri = uri
 
 
@@ -542,19 +546,23 @@ class CodeCoverageSummary(Model):
     :type coverage_data: list of :class:`CodeCoverageData <azure.devops.v5_1.test.models.CodeCoverageData>`
     :param delta_build: Uri of build against which difference in coverage is computed
     :type delta_build: :class:`ShallowReference <azure.devops.v5_1.test.models.ShallowReference>`
+    :param status: Uri of build against which difference in coverage is computed
+    :type status: object
     """
 
     _attribute_map = {
         'build': {'key': 'build', 'type': 'ShallowReference'},
         'coverage_data': {'key': 'coverageData', 'type': '[CodeCoverageData]'},
-        'delta_build': {'key': 'deltaBuild', 'type': 'ShallowReference'}
+        'delta_build': {'key': 'deltaBuild', 'type': 'ShallowReference'},
+        'status': {'key': 'status', 'type': 'object'}
     }
 
-    def __init__(self, build=None, coverage_data=None, delta_build=None):
+    def __init__(self, build=None, coverage_data=None, delta_build=None, status=None):
         super(CodeCoverageSummary, self).__init__()
         self.build = build
         self.coverage_data = coverage_data
         self.delta_build = delta_build
+        self.status = status
 
 
 class CoverageStatistics(Model):
@@ -1408,6 +1416,8 @@ class RunCreateModel(Model):
     :type start_date: str
     :param state: The state of the run. Valid states - NotStarted, InProgress, Waiting
     :type state: str
+    :param tags: Tags to attach with the test run, maximum of 5 tags can be added to run.
+    :type tags: list of :class:`TestTag <azure.devops.v5_1.test.models.TestTag>`
     :param test_configurations_mapping:
     :type test_configurations_mapping: str
     :param test_environment_id: ID of the test environment associated with the run.
@@ -1449,13 +1459,14 @@ class RunCreateModel(Model):
         'source_workflow': {'key': 'sourceWorkflow', 'type': 'str'},
         'start_date': {'key': 'startDate', 'type': 'str'},
         'state': {'key': 'state', 'type': 'str'},
+        'tags': {'key': 'tags', 'type': '[TestTag]'},
         'test_configurations_mapping': {'key': 'testConfigurationsMapping', 'type': 'str'},
         'test_environment_id': {'key': 'testEnvironmentId', 'type': 'str'},
         'test_settings': {'key': 'testSettings', 'type': 'ShallowReference'},
         'type': {'key': 'type', 'type': 'str'}
     }
 
-    def __init__(self, automated=None, build=None, build_drop_location=None, build_flavor=None, build_platform=None, build_reference=None, comment=None, complete_date=None, configuration_ids=None, controller=None, custom_test_fields=None, dtl_aut_environment=None, dtl_test_environment=None, due_date=None, environment_details=None, error_message=None, filter=None, iteration=None, name=None, owner=None, plan=None, point_ids=None, release_environment_uri=None, release_reference=None, release_uri=None, run_summary=None, run_timeout=None, source_workflow=None, start_date=None, state=None, test_configurations_mapping=None, test_environment_id=None, test_settings=None, type=None):
+    def __init__(self, automated=None, build=None, build_drop_location=None, build_flavor=None, build_platform=None, build_reference=None, comment=None, complete_date=None, configuration_ids=None, controller=None, custom_test_fields=None, dtl_aut_environment=None, dtl_test_environment=None, due_date=None, environment_details=None, error_message=None, filter=None, iteration=None, name=None, owner=None, plan=None, point_ids=None, release_environment_uri=None, release_reference=None, release_uri=None, run_summary=None, run_timeout=None, source_workflow=None, start_date=None, state=None, tags=None, test_configurations_mapping=None, test_environment_id=None, test_settings=None, type=None):
         super(RunCreateModel, self).__init__()
         self.automated = automated
         self.build = build
@@ -1487,6 +1498,7 @@ def __init__(self, automated=None, build=None, build_drop_location=None, build_f
         self.source_workflow = source_workflow
         self.start_date = start_date
         self.state = state
+        self.tags = tags
         self.test_configurations_mapping = test_configurations_mapping
         self.test_environment_id = test_environment_id
         self.test_settings = test_settings
@@ -1614,6 +1626,8 @@ class RunUpdateModel(Model):
     :type state: str
     :param substate:
     :type substate: object
+    :param tags: Tags to attach with the test run.
+    :type tags: list of :class:`TestTag <azure.devops.v5_1.test.models.TestTag>`
     :param test_environment_id:
     :type test_environment_id: str
     :param test_settings: An abstracted reference to test setting resource.
@@ -1644,11 +1658,12 @@ class RunUpdateModel(Model):
         'started_date': {'key': 'startedDate', 'type': 'str'},
         'state': {'key': 'state', 'type': 'str'},
         'substate': {'key': 'substate', 'type': 'object'},
+        'tags': {'key': 'tags', 'type': '[TestTag]'},
         'test_environment_id': {'key': 'testEnvironmentId', 'type': 'str'},
         'test_settings': {'key': 'testSettings', 'type': 'ShallowReference'}
     }
 
-    def __init__(self, build=None, build_drop_location=None, build_flavor=None, build_platform=None, comment=None, completed_date=None, controller=None, delete_in_progress_results=None, dtl_aut_environment=None, dtl_environment=None, dtl_environment_details=None, due_date=None, error_message=None, iteration=None, log_entries=None, name=None, release_environment_uri=None, release_uri=None, run_summary=None, source_workflow=None, started_date=None, state=None, substate=None, test_environment_id=None, test_settings=None):
+    def __init__(self, build=None, build_drop_location=None, build_flavor=None, build_platform=None, comment=None, completed_date=None, controller=None, delete_in_progress_results=None, dtl_aut_environment=None, dtl_environment=None, dtl_environment_details=None, due_date=None, error_message=None, iteration=None, log_entries=None, name=None, release_environment_uri=None, release_uri=None, run_summary=None, source_workflow=None, started_date=None, state=None, substate=None, tags=None, test_environment_id=None, test_settings=None):
         super(RunUpdateModel, self).__init__()
         self.build = build
         self.build_drop_location = build_drop_location
@@ -1673,6 +1688,7 @@ def __init__(self, build=None, build_drop_location=None, build_flavor=None, buil
         self.started_date = started_date
         self.state = state
         self.substate = substate
+        self.tags = tags
         self.test_environment_id = test_environment_id
         self.test_settings = test_settings
 
@@ -2577,6 +2593,26 @@ def __init__(self, existing_failures=None, fixed_tests=None, new_failures=None,
         self.previous_context = previous_context
 
 
+class TestFlakyIdentifier(Model):
+    """TestFlakyIdentifier.
+
+    :param branch_name: Branch Name where Flakiness has to be Marked/Unmarked
+    :type branch_name: str
+    :param is_flaky: State for Flakiness
+    :type is_flaky: bool
+    """
+
+    _attribute_map = {
+        'branch_name': {'key': 'branchName', 'type': 'str'},
+        'is_flaky': {'key': 'isFlaky', 'type': 'bool'}
+    }
+
+    def __init__(self, branch_name=None, is_flaky=None):
+        super(TestFlakyIdentifier, self).__init__()
+        self.branch_name = branch_name
+        self.is_flaky = is_flaky
+
+
 class TestHistoryQuery(Model):
     """TestHistoryQuery.
 
@@ -3268,6 +3304,8 @@ class TestResultMetaData(Model):
     :type automated_test_name: str
     :param automated_test_storage: AutomatedTestStorage of test result.
     :type automated_test_storage: str
+    :param flaky_identifiers: List of Flaky Identifier for TestCaseReferenceId
+    :type flaky_identifiers: list of :class:`TestFlakyIdentifier <azure.devops.v5_1.test.models.TestFlakyIdentifier>`
     :param owner: Owner of test result.
     :type owner: str
     :param priority: Priority of test result.
@@ -3281,16 +3319,18 @@ class TestResultMetaData(Model):
     _attribute_map = {
         'automated_test_name': {'key': 'automatedTestName', 'type': 'str'},
         'automated_test_storage': {'key': 'automatedTestStorage', 'type': 'str'},
+        'flaky_identifiers': {'key': 'flakyIdentifiers', 'type': '[TestFlakyIdentifier]'},
         'owner': {'key': 'owner', 'type': 'str'},
         'priority': {'key': 'priority', 'type': 'int'},
         'test_case_reference_id': {'key': 'testCaseReferenceId', 'type': 'int'},
         'test_case_title': {'key': 'testCaseTitle', 'type': 'str'}
     }
 
-    def __init__(self, automated_test_name=None, automated_test_storage=None, owner=None, priority=None, test_case_reference_id=None, test_case_title=None):
+    def __init__(self, automated_test_name=None, automated_test_storage=None, flaky_identifiers=None, owner=None, priority=None, test_case_reference_id=None, test_case_title=None):
         super(TestResultMetaData, self).__init__()
         self.automated_test_name = automated_test_name
         self.automated_test_storage = automated_test_storage
+        self.flaky_identifiers = flaky_identifiers
         self.owner = owner
         self.priority = priority
         self.test_case_reference_id = test_case_reference_id
@@ -3688,6 +3728,8 @@ class TestRun(Model):
     :type state: str
     :param substate:
     :type substate: object
+    :param tags: Tags attached with this test run.
+    :type tags: list of :class:`TestTag <azure.devops.v5_1.test.models.TestTag>`
     :param test_environment: Test environment associated with the run.
     :type test_environment: :class:`TestEnvironment <azure.devops.v5_1.test.models.TestEnvironment>`
     :param test_message_log_id:
@@ -3741,6 +3783,7 @@ class TestRun(Model):
         'started_date': {'key': 'startedDate', 'type': 'iso-8601'},
         'state': {'key': 'state', 'type': 'str'},
         'substate': {'key': 'substate', 'type': 'object'},
+        'tags': {'key': 'tags', 'type': '[TestTag]'},
         'test_environment': {'key': 'testEnvironment', 'type': 'TestEnvironment'},
         'test_message_log_id': {'key': 'testMessageLogId', 'type': 'int'},
         'test_settings': {'key': 'testSettings', 'type': 'ShallowReference'},
@@ -3750,7 +3793,7 @@ class TestRun(Model):
         'web_access_url': {'key': 'webAccessUrl', 'type': 'str'}
     }
 
-    def __init__(self, build=None, build_configuration=None, comment=None, completed_date=None, controller=None, created_date=None, custom_fields=None, drop_location=None, dtl_aut_environment=None, dtl_environment=None, dtl_environment_creation_details=None, due_date=None, error_message=None, filter=None, id=None, incomplete_tests=None, is_automated=None, iteration=None, last_updated_by=None, last_updated_date=None, name=None, not_applicable_tests=None, owner=None, passed_tests=None, phase=None, plan=None, post_process_state=None, project=None, release=None, release_environment_uri=None, release_uri=None, revision=None, run_statistics=None, started_date=None, state=None, substate=None, test_environment=None, test_message_log_id=None, test_settings=None, total_tests=None, unanalyzed_tests=None, url=None, web_access_url=None):
+    def __init__(self, build=None, build_configuration=None, comment=None, completed_date=None, controller=None, created_date=None, custom_fields=None, drop_location=None, dtl_aut_environment=None, dtl_environment=None, dtl_environment_creation_details=None, due_date=None, error_message=None, filter=None, id=None, incomplete_tests=None, is_automated=None, iteration=None, last_updated_by=None, last_updated_date=None, name=None, not_applicable_tests=None, owner=None, passed_tests=None, phase=None, plan=None, post_process_state=None, project=None, release=None, release_environment_uri=None, release_uri=None, revision=None, run_statistics=None, started_date=None, state=None, substate=None, tags=None, test_environment=None, test_message_log_id=None, test_settings=None, total_tests=None, unanalyzed_tests=None, url=None, web_access_url=None):
         super(TestRun, self).__init__()
         self.build = build
         self.build_configuration = build_configuration
@@ -3788,6 +3831,7 @@ def __init__(self, build=None, build_configuration=None, comment=None, completed
         self.started_date = started_date
         self.state = state
         self.substate = substate
+        self.tags = tags
         self.test_environment = test_environment
         self.test_message_log_id = test_message_log_id
         self.test_settings = test_settings
@@ -4197,6 +4241,22 @@ def __init__(self, summary=None, work_item=None):
         self.work_item = work_item
 
 
+class TestTag(Model):
+    """TestTag.
+
+    :param name: Name of the tag, alphanumeric value less than 30 chars
+    :type name: str
+    """
+
+    _attribute_map = {
+        'name': {'key': 'name', 'type': 'str'}
+    }
+
+    def __init__(self, name=None):
+        super(TestTag, self).__init__()
+        self.name = name
+
+
 class TestToWorkItemLinks(Model):
     """TestToWorkItemLinks.
 
@@ -4431,6 +4491,7 @@ def __init__(self, comment=None, completed_date=None, duration_in_ms=None, error
     'TestEnvironment',
     'TestFailureDetails',
     'TestFailuresAnalysis',
+    'TestFlakyIdentifier',
     'TestHistoryQuery',
     'TestIterationDetailsModel',
     'TestMessageLogDetails',
@@ -4468,6 +4529,7 @@ def __init__(self, comment=None, completed_date=None, duration_in_ms=None, error
     'TestSuite',
     'TestSuiteCloneRequest',
     'TestSummaryForWorkItem',
+    'TestTag',
     'TestToWorkItemLinks',
     'TestVariable',
     'WorkItemReference',
diff --git a/azure-devops/azure/devops/v5_1/universal/models.py b/azure-devops/azure/devops/v5_1/universal/models.py
index a64f7595..efa3bfe9 100644
--- a/azure-devops/azure/devops/v5_1/universal/models.py
+++ b/azure-devops/azure/devops/v5_1/universal/models.py
@@ -28,7 +28,7 @@ class JsonPatchOperation(Model):
     :type from_: str
     :param op: The patch operation
     :type op: object
-    :param path: The path for the operation
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
diff --git a/azure-devops/azure/devops/v5_1/work/__init__.py b/azure-devops/azure/devops/v5_1/work/__init__.py
index 35059bbf..a1476b9e 100644
--- a/azure-devops/azure/devops/v5_1/work/__init__.py
+++ b/azure-devops/azure/devops/v5_1/work/__init__.py
@@ -28,6 +28,7 @@
     'BoardRow',
     'BoardSuggestedValue',
     'BoardUserSettings',
+    'CapacityContractBase',
     'CapacityPatch',
     'CategoryConfiguration',
     'CreatePlan',
@@ -53,6 +54,7 @@
     'TeamFieldValuesPatch',
     'TeamIterationAttributes',
     'TeamMemberCapacity',
+    'TeamMemberCapacityIdentityRef',
     'TeamSetting',
     'TeamSettingsDataContractBase',
     'TeamSettingsDaysOff',
diff --git a/azure-devops/azure/devops/v5_1/work/models.py b/azure-devops/azure/devops/v5_1/work/models.py
index aa181ca0..dbf89e49 100644
--- a/azure-devops/azure/devops/v5_1/work/models.py
+++ b/azure-devops/azure/devops/v5_1/work/models.py
@@ -996,11 +996,11 @@ def __init__(self, default_value=None, values=None):
 class TeamIterationAttributes(Model):
     """TeamIterationAttributes.
 
-    :param finish_date:
+    :param finish_date: Finish date of the iteration. Date-only, correct unadjusted at midnight in UTC.
     :type finish_date: datetime
-    :param start_date:
+    :param start_date: Start date of the iteration. Date-only, correct unadjusted at midnight in UTC.
     :type start_date: datetime
-    :param time_frame:
+    :param time_frame: Time frame of the iteration, such as past, current or future.
     :type time_frame: object
     """
 
@@ -1082,13 +1082,13 @@ class TeamSettingsIteration(TeamSettingsDataContractBase):
     :type _links: :class:`ReferenceLinks <azure.devops.v5_1.work.models.ReferenceLinks>`
     :param url: Full http link to the resource
     :type url: str
-    :param attributes: Attributes such as start and end date
+    :param attributes: Attributes of the iteration such as start and end date.
     :type attributes: :class:`TeamIterationAttributes <azure.devops.v5_1.work.models.TeamIterationAttributes>`
-    :param id: Id of the resource
+    :param id: Id of the iteration.
     :type id: str
-    :param name: Name of the resource
+    :param name: Name of the iteration.
     :type name: str
-    :param path: Relative path of the iteration
+    :param path: Relative path of the iteration.
     :type path: str
     """
 
@@ -1592,6 +1592,32 @@ def __init__(self, name=None, url=None, _links=None, settings=None):
         self.settings = settings
 
 
+class CapacityContractBase(TeamSettingsDataContractBase):
+    """CapacityContractBase.
+
+    :param _links: Collection of links relevant to resource
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.work.models.ReferenceLinks>`
+    :param url: Full http link to the resource
+    :type url: str
+    :param activities: Collection of capacities associated with the team member
+    :type activities: list of :class:`Activity <azure.devops.v5_1.work.models.Activity>`
+    :param days_off: The days off associated with the team member
+    :type days_off: list of :class:`DateRange <azure.devops.v5_1.work.models.DateRange>`
+    """
+
+    _attribute_map = {
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'url': {'key': 'url', 'type': 'str'},
+        'activities': {'key': 'activities', 'type': '[Activity]'},
+        'days_off': {'key': 'daysOff', 'type': '[DateRange]'}
+    }
+
+    def __init__(self, _links=None, url=None, activities=None, days_off=None):
+        super(CapacityContractBase, self).__init__(_links=_links, url=url)
+        self.activities = activities
+        self.days_off = days_off
+
+
 class DeliveryViewData(PlanViewData):
     """DeliveryViewData.
 
@@ -1686,7 +1712,7 @@ def __init__(self, _links=None, url=None, default_value=None, field=None, values
         self.values = values
 
 
-class TeamMemberCapacity(TeamSettingsDataContractBase):
+class TeamMemberCapacity(CapacityContractBase):
     """TeamMemberCapacity.
 
     :param _links: Collection of links relevant to resource
@@ -1710,9 +1736,35 @@ class TeamMemberCapacity(TeamSettingsDataContractBase):
     }
 
     def __init__(self, _links=None, url=None, activities=None, days_off=None, team_member=None):
-        super(TeamMemberCapacity, self).__init__(_links=_links, url=url)
-        self.activities = activities
-        self.days_off = days_off
+        super(TeamMemberCapacity, self).__init__(_links=_links, url=url, activities=activities, days_off=days_off)
+        self.team_member = team_member
+
+
+class TeamMemberCapacityIdentityRef(CapacityContractBase):
+    """TeamMemberCapacityIdentityRef.
+
+    :param _links: Collection of links relevant to resource
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.work.models.ReferenceLinks>`
+    :param url: Full http link to the resource
+    :type url: str
+    :param activities: Collection of capacities associated with the team member
+    :type activities: list of :class:`Activity <azure.devops.v5_1.work.models.Activity>`
+    :param days_off: The days off associated with the team member
+    :type days_off: list of :class:`DateRange <azure.devops.v5_1.work.models.DateRange>`
+    :param team_member: Identity ref of the associated team member
+    :type team_member: :class:`IdentityRef <azure.devops.v5_1.work.models.IdentityRef>`
+    """
+
+    _attribute_map = {
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'url': {'key': 'url', 'type': 'str'},
+        'activities': {'key': 'activities', 'type': '[Activity]'},
+        'days_off': {'key': 'daysOff', 'type': '[DateRange]'},
+        'team_member': {'key': 'teamMember', 'type': 'IdentityRef'}
+    }
+
+    def __init__(self, _links=None, url=None, activities=None, days_off=None, team_member=None):
+        super(TeamMemberCapacityIdentityRef, self).__init__(_links=_links, url=url, activities=activities, days_off=days_off)
         self.team_member = team_member
 
 
@@ -1765,6 +1817,12 @@ class WorkItemCommentVersionRef(WorkItemTrackingResourceReference):
     :type url: str
     :param comment_id: The id assigned to the comment.
     :type comment_id: int
+    :param created_in_revision: [Internal] The work item revision where this comment was originally added.
+    :type created_in_revision: int
+    :param is_deleted: [Internal] Specifies whether comment was deleted.
+    :type is_deleted: bool
+    :param text: [Internal] The text of the comment.
+    :type text: str
     :param version: The version number.
     :type version: int
     """
@@ -1772,12 +1830,18 @@ class WorkItemCommentVersionRef(WorkItemTrackingResourceReference):
     _attribute_map = {
         'url': {'key': 'url', 'type': 'str'},
         'comment_id': {'key': 'commentId', 'type': 'int'},
+        'created_in_revision': {'key': 'createdInRevision', 'type': 'int'},
+        'is_deleted': {'key': 'isDeleted', 'type': 'bool'},
+        'text': {'key': 'text', 'type': 'str'},
         'version': {'key': 'version', 'type': 'int'}
     }
 
-    def __init__(self, url=None, comment_id=None, version=None):
+    def __init__(self, url=None, comment_id=None, created_in_revision=None, is_deleted=None, text=None, version=None):
         super(WorkItemCommentVersionRef, self).__init__(url=url)
         self.comment_id = comment_id
+        self.created_in_revision = created_in_revision
+        self.is_deleted = is_deleted
+        self.text = text
         self.version = version
 
 
@@ -1897,10 +1961,12 @@ def __init__(self, url=None, _links=None, comment_version_ref=None, fields=None,
     'WorkItemTypeStateInfo',
     'Board',
     'BoardChart',
+    'CapacityContractBase',
     'DeliveryViewData',
     'IterationWorkItems',
     'TeamFieldValues',
     'TeamMemberCapacity',
+    'TeamMemberCapacityIdentityRef',
     'TeamSetting',
     'WorkItemCommentVersionRef',
     'WorkItemTrackingResource',
diff --git a/azure-devops/azure/devops/v5_1/work/work_client.py b/azure-devops/azure/devops/v5_1/work/work_client.py
index cf577dda..f6bb6f63 100644
--- a/azure-devops/azure/devops/v5_1/work/work_client.py
+++ b/azure-devops/azure/devops/v5_1/work/work_client.py
@@ -378,12 +378,12 @@ def update_board_user_settings(self, board_user_settings, team_context, board):
                               content=content)
         return self._deserialize('BoardUserSettings', response)
 
-    def get_capacities(self, team_context, iteration_id):
-        """GetCapacities.
+    def get_capacities_with_identity_ref(self, team_context, iteration_id):
+        """GetCapacitiesWithIdentityRef.
         [Preview API] Get a team's capacity
         :param :class:`<TeamContext> <azure.devops.v5_1.work.models.TeamContext>` team_context: The team context for the operation
         :param str iteration_id: ID of the iteration
-        :rtype: [TeamMemberCapacity]
+        :rtype: [TeamMemberCapacityIdentityRef]
         """
         project = None
         team = None
@@ -406,17 +406,17 @@ def get_capacities(self, team_context, iteration_id):
             route_values['iterationId'] = self._serialize.url('iteration_id', iteration_id, 'str')
         response = self._send(http_method='GET',
                               location_id='74412d15-8c1a-4352-a48d-ef1ed5587d57',
-                              version='5.1-preview.1',
+                              version='5.1-preview.2',
                               route_values=route_values)
-        return self._deserialize('[TeamMemberCapacity]', self._unwrap_collection(response))
+        return self._deserialize('[TeamMemberCapacityIdentityRef]', self._unwrap_collection(response))
 
-    def get_capacity(self, team_context, iteration_id, team_member_id):
-        """GetCapacity.
+    def get_capacity_with_identity_ref(self, team_context, iteration_id, team_member_id):
+        """GetCapacityWithIdentityRef.
         [Preview API] Get a team member's capacity
         :param :class:`<TeamContext> <azure.devops.v5_1.work.models.TeamContext>` team_context: The team context for the operation
         :param str iteration_id: ID of the iteration
         :param str team_member_id: ID of the team member
-        :rtype: :class:`<TeamMemberCapacity> <azure.devops.v5_1.work.models.TeamMemberCapacity>`
+        :rtype: :class:`<TeamMemberCapacityIdentityRef> <azure.devops.v5_1.work.models.TeamMemberCapacityIdentityRef>`
         """
         project = None
         team = None
@@ -441,17 +441,17 @@ def get_capacity(self, team_context, iteration_id, team_member_id):
             route_values['teamMemberId'] = self._serialize.url('team_member_id', team_member_id, 'str')
         response = self._send(http_method='GET',
                               location_id='74412d15-8c1a-4352-a48d-ef1ed5587d57',
-                              version='5.1-preview.1',
+                              version='5.1-preview.2',
                               route_values=route_values)
-        return self._deserialize('TeamMemberCapacity', response)
+        return self._deserialize('TeamMemberCapacityIdentityRef', response)
 
-    def replace_capacities(self, capacities, team_context, iteration_id):
-        """ReplaceCapacities.
+    def replace_capacities_with_identity_ref(self, capacities, team_context, iteration_id):
+        """ReplaceCapacitiesWithIdentityRef.
         [Preview API] Replace a team's capacity
-        :param [TeamMemberCapacity] capacities: Team capacity to replace
+        :param [TeamMemberCapacityIdentityRef] capacities: Team capacity to replace
         :param :class:`<TeamContext> <azure.devops.v5_1.work.models.TeamContext>` team_context: The team context for the operation
         :param str iteration_id: ID of the iteration
-        :rtype: [TeamMemberCapacity]
+        :rtype: [TeamMemberCapacityIdentityRef]
         """
         project = None
         team = None
@@ -472,22 +472,22 @@ def replace_capacities(self, capacities, team_context, iteration_id):
             route_values['team'] = self._serialize.url('team', team, 'string')
         if iteration_id is not None:
             route_values['iterationId'] = self._serialize.url('iteration_id', iteration_id, 'str')
-        content = self._serialize.body(capacities, '[TeamMemberCapacity]')
+        content = self._serialize.body(capacities, '[TeamMemberCapacityIdentityRef]')
         response = self._send(http_method='PUT',
                               location_id='74412d15-8c1a-4352-a48d-ef1ed5587d57',
-                              version='5.1-preview.1',
+                              version='5.1-preview.2',
                               route_values=route_values,
                               content=content)
-        return self._deserialize('[TeamMemberCapacity]', self._unwrap_collection(response))
+        return self._deserialize('[TeamMemberCapacityIdentityRef]', self._unwrap_collection(response))
 
-    def update_capacity(self, patch, team_context, iteration_id, team_member_id):
-        """UpdateCapacity.
+    def update_capacity_with_identity_ref(self, patch, team_context, iteration_id, team_member_id):
+        """UpdateCapacityWithIdentityRef.
         [Preview API] Update a team member's capacity
         :param :class:`<CapacityPatch> <azure.devops.v5_1.work.models.CapacityPatch>` patch: Updated capacity
         :param :class:`<TeamContext> <azure.devops.v5_1.work.models.TeamContext>` team_context: The team context for the operation
         :param str iteration_id: ID of the iteration
         :param str team_member_id: ID of the team member
-        :rtype: :class:`<TeamMemberCapacity> <azure.devops.v5_1.work.models.TeamMemberCapacity>`
+        :rtype: :class:`<TeamMemberCapacityIdentityRef> <azure.devops.v5_1.work.models.TeamMemberCapacityIdentityRef>`
         """
         project = None
         team = None
@@ -513,10 +513,10 @@ def update_capacity(self, patch, team_context, iteration_id, team_member_id):
         content = self._serialize.body(patch, 'CapacityPatch')
         response = self._send(http_method='PATCH',
                               location_id='74412d15-8c1a-4352-a48d-ef1ed5587d57',
-                              version='5.1-preview.1',
+                              version='5.1-preview.2',
                               route_values=route_values,
                               content=content)
-        return self._deserialize('TeamMemberCapacity', response)
+        return self._deserialize('TeamMemberCapacityIdentityRef', response)
 
     def get_board_card_rule_settings(self, team_context, board):
         """GetBoardCardRuleSettings.
diff --git a/azure-devops/azure/devops/v5_1/work_item_tracking/__init__.py b/azure-devops/azure/devops/v5_1/work_item_tracking/__init__.py
index 0fdf4622..7673c974 100644
--- a/azure-devops/azure/devops/v5_1/work_item_tracking/__init__.py
+++ b/azure-devops/azure/devops/v5_1/work_item_tracking/__init__.py
@@ -19,6 +19,13 @@
     'ArtifactUriQuery',
     'ArtifactUriQueryResult',
     'AttachmentReference',
+    'Comment',
+    'CommentCreate',
+    'CommentList',
+    'CommentReaction',
+    'CommentReportingList',
+    'CommentUpdate',
+    'CommentVersion',
     'FieldDependentRule',
     'FieldsToEvaluate',
     'GraphSubjectBase',
@@ -26,6 +33,9 @@
     'IdentityReference',
     'JsonPatchOperation',
     'Link',
+    'Operation',
+    'OperationReference',
+    'OperationResultReference',
     'ProjectWorkItemStateColors',
     'ProvisioningResult',
     'QueryBatchGetRequest',
diff --git a/azure-devops/azure/devops/v5_1/work_item_tracking/models.py b/azure-devops/azure/devops/v5_1/work_item_tracking/models.py
index 6b83ed84..fdc498df 100644
--- a/azure-devops/azure/devops/v5_1/work_item_tracking/models.py
+++ b/azure-devops/azure/devops/v5_1/work_item_tracking/models.py
@@ -209,6 +209,38 @@ def __init__(self, id=None, url=None):
         self.url = url
 
 
+class CommentCreate(Model):
+    """CommentCreate.
+
+    :param text: The text of the comment.
+    :type text: str
+    """
+
+    _attribute_map = {
+        'text': {'key': 'text', 'type': 'str'}
+    }
+
+    def __init__(self, text=None):
+        super(CommentCreate, self).__init__()
+        self.text = text
+
+
+class CommentUpdate(Model):
+    """CommentUpdate.
+
+    :param text: The updated text of the comment.
+    :type text: str
+    """
+
+    _attribute_map = {
+        'text': {'key': 'text', 'type': 'str'}
+    }
+
+    def __init__(self, text=None):
+        super(CommentUpdate, self).__init__()
+        self.text = text
+
+
 class FieldsToEvaluate(Model):
     """FieldsToEvaluate.
 
@@ -387,8 +419,8 @@ class JsonPatchOperation(Model):
     :param from_: The path to copy from for the Move/Copy operation.
     :type from_: str
     :param op: The patch operation
-    :type op: object
-    :param path: The path for the operation
+    :type op: :class:`Operation <azure.devops.v5_1.microsoft._visual_studio._services._web_api.models.Operation>`
+    :param path: The path for the operation. In the case of an array, a zero based index can be used to specify the position in the array (e.g. /biscuits/0/name). The "-" character can be used instead of an index to insert at the end of the array (e.g. /biscuits/-).
     :type path: str
     :param value: The value for the operation. This is either a primitive or a JToken.
     :type value: object
@@ -396,7 +428,7 @@ class JsonPatchOperation(Model):
 
     _attribute_map = {
         'from_': {'key': 'from', 'type': 'str'},
-        'op': {'key': 'op', 'type': 'object'},
+        'op': {'key': 'op', 'type': 'Operation'},
         'path': {'key': 'path', 'type': 'str'},
         'value': {'key': 'value', 'type': 'object'}
     }
@@ -433,6 +465,50 @@ def __init__(self, attributes=None, rel=None, url=None):
         self.url = url
 
 
+class OperationReference(Model):
+    """OperationReference.
+
+    :param id: Unique identifier for the operation.
+    :type id: str
+    :param plugin_id: Unique identifier for the plugin.
+    :type plugin_id: str
+    :param status: The current status of the operation.
+    :type status: object
+    :param url: URL to get the full operation object.
+    :type url: str
+    """
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'plugin_id': {'key': 'pluginId', 'type': 'str'},
+        'status': {'key': 'status', 'type': 'object'},
+        'url': {'key': 'url', 'type': 'str'}
+    }
+
+    def __init__(self, id=None, plugin_id=None, status=None, url=None):
+        super(OperationReference, self).__init__()
+        self.id = id
+        self.plugin_id = plugin_id
+        self.status = status
+        self.url = url
+
+
+class OperationResultReference(Model):
+    """OperationResultReference.
+
+    :param result_url: URL to the operation result.
+    :type result_url: str
+    """
+
+    _attribute_map = {
+        'result_url': {'key': 'resultUrl', 'type': 'str'}
+    }
+
+    def __init__(self, result_url=None):
+        super(OperationResultReference, self).__init__()
+        self.result_url = result_url
+
+
 class ProjectWorkItemStateColors(Model):
     """ProjectWorkItemStateColors.
 
@@ -572,13 +648,13 @@ def __init__(self, fields=None, include_deleted=None, include_identity_ref=None,
 class StreamedBatch(Model):
     """StreamedBatch.
 
-    :param continuation_token:
+    :param continuation_token: ContinuationToken acts as a waterMark. Used while quering large results.
     :type continuation_token: str
-    :param is_last_batch:
+    :param is_last_batch: Returns 'true' if it's last batch, 'false' otherwise.
     :type is_last_batch: bool
-    :param next_link:
+    :param next_link: The next link for the work item.
     :type next_link: str
-    :param values:
+    :param values: Values such as rel, sourceId, TargetId, ChangedDate, isActive.
     :type values: list of object
     """
 
@@ -1430,6 +1506,46 @@ def __init__(self, activity_date=None, activity_type=None, changed_date=None, id
         self.assigned_to = assigned_to
 
 
+class Operation(OperationReference):
+    """Operation.
+
+    :param id: Unique identifier for the operation.
+    :type id: str
+    :param plugin_id: Unique identifier for the plugin.
+    :type plugin_id: str
+    :param status: The current status of the operation.
+    :type status: object
+    :param url: URL to get the full operation object.
+    :type url: str
+    :param _links: Links to other related objects.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.microsoft._visual_studio._services._web_api.models.ReferenceLinks>`
+    :param detailed_message: Detailed messaged about the status of an operation.
+    :type detailed_message: str
+    :param result_message: Result message for an operation.
+    :type result_message: str
+    :param result_url: URL to the operation result.
+    :type result_url: :class:`OperationResultReference <azure.devops.v5_1.microsoft._visual_studio._services._web_api.models.OperationResultReference>`
+    """
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'plugin_id': {'key': 'pluginId', 'type': 'str'},
+        'status': {'key': 'status', 'type': 'object'},
+        'url': {'key': 'url', 'type': 'str'},
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'detailed_message': {'key': 'detailedMessage', 'type': 'str'},
+        'result_message': {'key': 'resultMessage', 'type': 'str'},
+        'result_url': {'key': 'resultUrl', 'type': 'OperationResultReference'}
+    }
+
+    def __init__(self, id=None, plugin_id=None, status=None, url=None, _links=None, detailed_message=None, result_message=None, result_url=None):
+        super(Operation, self).__init__(id=id, plugin_id=plugin_id, status=status, url=url)
+        self._links = _links
+        self.detailed_message = detailed_message
+        self.result_message = result_message
+        self.result_url = result_url
+
+
 class ReportingWorkItemLinksBatch(StreamedBatch):
     """ReportingWorkItemLinksBatch.
 
@@ -1461,6 +1577,12 @@ class WorkItemCommentVersionRef(WorkItemTrackingResourceReference):
     :type url: str
     :param comment_id: The id assigned to the comment.
     :type comment_id: int
+    :param created_in_revision: [Internal] The work item revision where this comment was originally added.
+    :type created_in_revision: int
+    :param is_deleted: [Internal] Specifies whether comment was deleted.
+    :type is_deleted: bool
+    :param text: [Internal] The text of the comment.
+    :type text: str
     :param version: The version number.
     :type version: int
     """
@@ -1468,12 +1590,18 @@ class WorkItemCommentVersionRef(WorkItemTrackingResourceReference):
     _attribute_map = {
         'url': {'key': 'url', 'type': 'str'},
         'comment_id': {'key': 'commentId', 'type': 'int'},
+        'created_in_revision': {'key': 'createdInRevision', 'type': 'int'},
+        'is_deleted': {'key': 'isDeleted', 'type': 'bool'},
+        'text': {'key': 'text', 'type': 'str'},
         'version': {'key': 'version', 'type': 'int'}
     }
 
-    def __init__(self, url=None, comment_id=None, version=None):
+    def __init__(self, url=None, comment_id=None, created_in_revision=None, is_deleted=None, text=None, version=None):
         super(WorkItemCommentVersionRef, self).__init__(url=url)
         self.comment_id = comment_id
+        self.created_in_revision = created_in_revision
+        self.is_deleted = is_deleted
+        self.text = text
         self.version = version
 
 
@@ -1719,6 +1847,243 @@ def __init__(self, url=None, _links=None, fields=None, id=None, relations=None,
         self.work_item_id = work_item_id
 
 
+class Comment(WorkItemTrackingResource):
+    """Comment.
+
+    :param url:
+    :type url: str
+    :param _links: Link references to related REST resources.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.work_item_tracking.models.ReferenceLinks>`
+    :param created_by: IdentityRef of the creator of the comment.
+    :type created_by: :class:`IdentityRef <azure.devops.v5_1.work_item_tracking.models.IdentityRef>`
+    :param created_date: The creation date of the comment.
+    :type created_date: datetime
+    :param created_on_behalf_date: Effective Date/time value for adding the comment. Can be optionally different from CreatedDate.
+    :type created_on_behalf_date: datetime
+    :param created_on_behalf_of: Identity on whose behalf this comment has been added. Can be optionally different from CreatedBy.
+    :type created_on_behalf_of: :class:`IdentityRef <azure.devops.v5_1.work_item_tracking.models.IdentityRef>`
+    :param id: The id assigned to the comment.
+    :type id: int
+    :param is_deleted: Indicates if the comment has been deleted.
+    :type is_deleted: bool
+    :param modified_by: IdentityRef of the user who last modified the comment.
+    :type modified_by: :class:`IdentityRef <azure.devops.v5_1.work_item_tracking.models.IdentityRef>`
+    :param modified_date: The last modification date of the comment.
+    :type modified_date: datetime
+    :param reactions: The reactions of the comment.
+    :type reactions: list of :class:`CommentReaction <azure.devops.v5_1.work_item_tracking.models.CommentReaction>`
+    :param text: The text of the comment.
+    :type text: str
+    :param version: The current version of the comment.
+    :type version: int
+    :param work_item_id: The id of the work item this comment belongs to.
+    :type work_item_id: int
+    """
+
+    _attribute_map = {
+        'url': {'key': 'url', 'type': 'str'},
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'created_by': {'key': 'createdBy', 'type': 'IdentityRef'},
+        'created_date': {'key': 'createdDate', 'type': 'iso-8601'},
+        'created_on_behalf_date': {'key': 'createdOnBehalfDate', 'type': 'iso-8601'},
+        'created_on_behalf_of': {'key': 'createdOnBehalfOf', 'type': 'IdentityRef'},
+        'id': {'key': 'id', 'type': 'int'},
+        'is_deleted': {'key': 'isDeleted', 'type': 'bool'},
+        'modified_by': {'key': 'modifiedBy', 'type': 'IdentityRef'},
+        'modified_date': {'key': 'modifiedDate', 'type': 'iso-8601'},
+        'reactions': {'key': 'reactions', 'type': '[CommentReaction]'},
+        'text': {'key': 'text', 'type': 'str'},
+        'version': {'key': 'version', 'type': 'int'},
+        'work_item_id': {'key': 'workItemId', 'type': 'int'}
+    }
+
+    def __init__(self, url=None, _links=None, created_by=None, created_date=None, created_on_behalf_date=None, created_on_behalf_of=None, id=None, is_deleted=None, modified_by=None, modified_date=None, reactions=None, text=None, version=None, work_item_id=None):
+        super(Comment, self).__init__(url=url, _links=_links)
+        self.created_by = created_by
+        self.created_date = created_date
+        self.created_on_behalf_date = created_on_behalf_date
+        self.created_on_behalf_of = created_on_behalf_of
+        self.id = id
+        self.is_deleted = is_deleted
+        self.modified_by = modified_by
+        self.modified_date = modified_date
+        self.reactions = reactions
+        self.text = text
+        self.version = version
+        self.work_item_id = work_item_id
+
+
+class CommentList(WorkItemTrackingResource):
+    """CommentList.
+
+    :param url:
+    :type url: str
+    :param _links: Link references to related REST resources.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.work_item_tracking.models.ReferenceLinks>`
+    :param comments: List of comments in the current batch.
+    :type comments: list of :class:`Comment <azure.devops.v5_1.work_item_tracking.models.Comment>`
+    :param continuation_token: A string token that can be used to retrieving next page of comments if available. Otherwise null.
+    :type continuation_token: str
+    :param count: The count of comments in the current batch.
+    :type count: int
+    :param next_page: Uri to the next page of comments if it is available. Otherwise null.
+    :type next_page: str
+    :param total_count: Total count of comments on a work item.
+    :type total_count: int
+    """
+
+    _attribute_map = {
+        'url': {'key': 'url', 'type': 'str'},
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'comments': {'key': 'comments', 'type': '[Comment]'},
+        'continuation_token': {'key': 'continuationToken', 'type': 'str'},
+        'count': {'key': 'count', 'type': 'int'},
+        'next_page': {'key': 'nextPage', 'type': 'str'},
+        'total_count': {'key': 'totalCount', 'type': 'int'}
+    }
+
+    def __init__(self, url=None, _links=None, comments=None, continuation_token=None, count=None, next_page=None, total_count=None):
+        super(CommentList, self).__init__(url=url, _links=_links)
+        self.comments = comments
+        self.continuation_token = continuation_token
+        self.count = count
+        self.next_page = next_page
+        self.total_count = total_count
+
+
+class CommentReaction(WorkItemTrackingResource):
+    """CommentReaction.
+
+    :param url:
+    :type url: str
+    :param _links: Link references to related REST resources.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.work_item_tracking.models.ReferenceLinks>`
+    :param comment_id: The id of the comment this reaction belongs to.
+    :type comment_id: int
+    :param count: Total number of reactions for the CommentReactionType.
+    :type count: int
+    :param is_current_user_engaged: Flag to indicate if the current user has engaged on this particular EngagementType (e.g. if they liked the associated comment).
+    :type is_current_user_engaged: bool
+    :param type: Type of the reaction.
+    :type type: object
+    """
+
+    _attribute_map = {
+        'url': {'key': 'url', 'type': 'str'},
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'comment_id': {'key': 'commentId', 'type': 'int'},
+        'count': {'key': 'count', 'type': 'int'},
+        'is_current_user_engaged': {'key': 'isCurrentUserEngaged', 'type': 'bool'},
+        'type': {'key': 'type', 'type': 'object'}
+    }
+
+    def __init__(self, url=None, _links=None, comment_id=None, count=None, is_current_user_engaged=None, type=None):
+        super(CommentReaction, self).__init__(url=url, _links=_links)
+        self.comment_id = comment_id
+        self.count = count
+        self.is_current_user_engaged = is_current_user_engaged
+        self.type = type
+
+
+class CommentReportingList(CommentList):
+    """CommentReportingList.
+
+    :param url:
+    :type url: str
+    :param _links: Link references to related REST resources.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.work_item_tracking.models.ReferenceLinks>`
+    :param comments: List of comments in the current batch.
+    :type comments: list of :class:`Comment <azure.devops.v5_1.work_item_tracking.models.Comment>`
+    :param continuation_token: A string token that can be used to retrieving next page of comments if available. Otherwise null.
+    :type continuation_token: str
+    :param count: The count of comments in the current batch.
+    :type count: int
+    :param next_page: Uri to the next page of comments if it is available. Otherwise null.
+    :type next_page: str
+    :param total_count: Total count of comments on a work item.
+    :type total_count: int
+    :param is_last_batch: Indicates if this is the last batch.
+    :type is_last_batch: bool
+    """
+
+    _attribute_map = {
+        'url': {'key': 'url', 'type': 'str'},
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'comments': {'key': 'comments', 'type': '[Comment]'},
+        'continuation_token': {'key': 'continuationToken', 'type': 'str'},
+        'count': {'key': 'count', 'type': 'int'},
+        'next_page': {'key': 'nextPage', 'type': 'str'},
+        'total_count': {'key': 'totalCount', 'type': 'int'},
+        'is_last_batch': {'key': 'isLastBatch', 'type': 'bool'}
+    }
+
+    def __init__(self, url=None, _links=None, comments=None, continuation_token=None, count=None, next_page=None, total_count=None, is_last_batch=None):
+        super(CommentReportingList, self).__init__(url=url, _links=_links, comments=comments, continuation_token=continuation_token, count=count, next_page=next_page, total_count=total_count)
+        self.is_last_batch = is_last_batch
+
+
+class CommentVersion(WorkItemTrackingResource):
+    """CommentVersion.
+
+    :param url:
+    :type url: str
+    :param _links: Link references to related REST resources.
+    :type _links: :class:`ReferenceLinks <azure.devops.v5_1.work_item_tracking.models.ReferenceLinks>`
+    :param created_by: IdentityRef of the creator of the comment.
+    :type created_by: :class:`IdentityRef <azure.devops.v5_1.work_item_tracking.models.IdentityRef>`
+    :param created_date: The creation date of the comment.
+    :type created_date: datetime
+    :param created_on_behalf_date: Effective Date/time value for adding the comment. Can be optionally different from CreatedDate.
+    :type created_on_behalf_date: datetime
+    :param created_on_behalf_of: Identity on whose behalf this comment has been added. Can be optionally different from CreatedBy.
+    :type created_on_behalf_of: :class:`IdentityRef <azure.devops.v5_1.work_item_tracking.models.IdentityRef>`
+    :param id: The id assigned to the comment.
+    :type id: int
+    :param is_deleted: Indicates if the comment has been deleted at this version.
+    :type is_deleted: bool
+    :param modified_by: IdentityRef of the user who modified the comment at this version.
+    :type modified_by: :class:`IdentityRef <azure.devops.v5_1.work_item_tracking.models.IdentityRef>`
+    :param modified_date: The modification date of the comment for this version.
+    :type modified_date: datetime
+    :param rendered_text: The rendered content of the comment at this version.
+    :type rendered_text: str
+    :param text: The text of the comment at this version.
+    :type text: str
+    :param version: The version number.
+    :type version: int
+    """
+
+    _attribute_map = {
+        'url': {'key': 'url', 'type': 'str'},
+        '_links': {'key': '_links', 'type': 'ReferenceLinks'},
+        'created_by': {'key': 'createdBy', 'type': 'IdentityRef'},
+        'created_date': {'key': 'createdDate', 'type': 'iso-8601'},
+        'created_on_behalf_date': {'key': 'createdOnBehalfDate', 'type': 'iso-8601'},
+        'created_on_behalf_of': {'key': 'createdOnBehalfOf', 'type': 'IdentityRef'},
+        'id': {'key': 'id', 'type': 'int'},
+        'is_deleted': {'key': 'isDeleted', 'type': 'bool'},
+        'modified_by': {'key': 'modifiedBy', 'type': 'IdentityRef'},
+        'modified_date': {'key': 'modifiedDate', 'type': 'iso-8601'},
+        'rendered_text': {'key': 'renderedText', 'type': 'str'},
+        'text': {'key': 'text', 'type': 'str'},
+        'version': {'key': 'version', 'type': 'int'}
+    }
+
+    def __init__(self, url=None, _links=None, created_by=None, created_date=None, created_on_behalf_date=None, created_on_behalf_of=None, id=None, is_deleted=None, modified_by=None, modified_date=None, rendered_text=None, text=None, version=None):
+        super(CommentVersion, self).__init__(url=url, _links=_links)
+        self.created_by = created_by
+        self.created_date = created_date
+        self.created_on_behalf_date = created_on_behalf_date
+        self.created_on_behalf_of = created_on_behalf_of
+        self.id = id
+        self.is_deleted = is_deleted
+        self.modified_by = modified_by
+        self.modified_date = modified_date
+        self.rendered_text = rendered_text
+        self.text = text
+        self.version = version
+
+
 class FieldDependentRule(WorkItemTrackingResource):
     """FieldDependentRule.
 
@@ -2249,12 +2614,16 @@ def __init__(self, url=None, _links=None, description=None, id=None, name=None,
     'ArtifactUriQuery',
     'ArtifactUriQueryResult',
     'AttachmentReference',
+    'CommentCreate',
+    'CommentUpdate',
     'FieldsToEvaluate',
     'GraphSubjectBase',
     'IdentityRef',
     'IdentityReference',
     'JsonPatchOperation',
     'Link',
+    'OperationReference',
+    'OperationResultReference',
     'ProjectWorkItemStateColors',
     'ProvisioningResult',
     'QueryBatchGetRequest',
@@ -2294,6 +2663,7 @@ def __init__(self, url=None, _links=None, description=None, id=None, name=None,
     'WorkItemTypeTemplateUpdateModel',
     'AccountRecentActivityWorkItemModel',
     'AccountRecentActivityWorkItemModel2',
+    'Operation',
     'ReportingWorkItemLinksBatch',
     'ReportingWorkItemRevisionsBatch',
     'WorkItemCommentVersionRef',
@@ -2303,6 +2673,11 @@ def __init__(self, url=None, _links=None, description=None, id=None, name=None,
     'WorkItemTypeCategory',
     'WorkItemTypeFieldInstance',
     'WorkItemUpdate',
+    'Comment',
+    'CommentList',
+    'CommentReaction',
+    'CommentReportingList',
+    'CommentVersion',
     'FieldDependentRule',
     'QueryHierarchyItem',
     'WorkItem',
diff --git a/azure-devops/azure/devops/v5_1/work_item_tracking/work_item_tracking_client.py b/azure-devops/azure/devops/v5_1/work_item_tracking/work_item_tracking_client.py
index 32742fe4..f250d81d 100644
--- a/azure-devops/azure/devops/v5_1/work_item_tracking/work_item_tracking_client.py
+++ b/azure-devops/azure/devops/v5_1/work_item_tracking/work_item_tracking_client.py
@@ -304,6 +304,304 @@ def update_classification_node(self, posted_node, project, structure_group, path
                               content=content)
         return self._deserialize('WorkItemClassificationNode', response)
 
+    def add_comment(self, request, project, work_item_id):
+        """AddComment.
+        [Preview API] Add a comment on a work item.
+        :param :class:`<CommentCreate> <azure.devops.v5_1.work_item_tracking.models.CommentCreate>` request: Comment create request.
+        :param str project: Project ID or project name
+        :param int work_item_id: Id of a work item.
+        :rtype: :class:`<Comment> <azure.devops.v5_1.work-item-tracking.models.Comment>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        content = self._serialize.body(request, 'CommentCreate')
+        response = self._send(http_method='POST',
+                              location_id='608aac0a-32e1-4493-a863-b9cf4566d257',
+                              version='5.1-preview.3',
+                              route_values=route_values,
+                              content=content)
+        return self._deserialize('Comment', response)
+
+    def delete_comment(self, project, work_item_id, comment_id):
+        """DeleteComment.
+        [Preview API] Delete a comment on a work item.
+        :param str project: Project ID or project name
+        :param int work_item_id: Id of a work item.
+        :param int comment_id:
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        if comment_id is not None:
+            route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
+        self._send(http_method='DELETE',
+                   location_id='608aac0a-32e1-4493-a863-b9cf4566d257',
+                   version='5.1-preview.3',
+                   route_values=route_values)
+
+    def get_comment(self, project, work_item_id, comment_id, include_deleted=None, expand=None):
+        """GetComment.
+        [Preview API] Returns a work item comment.
+        :param str project: Project ID or project name
+        :param int work_item_id: Id of a work item to get the comment.
+        :param int comment_id: Id of the comment to return.
+        :param bool include_deleted: Specify if the deleted comment should be retrieved.
+        :param str expand: Specifies the additional data retrieval options for work item comments.
+        :rtype: :class:`<Comment> <azure.devops.v5_1.work-item-tracking.models.Comment>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        if comment_id is not None:
+            route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
+        query_parameters = {}
+        if include_deleted is not None:
+            query_parameters['includeDeleted'] = self._serialize.query('include_deleted', include_deleted, 'bool')
+        if expand is not None:
+            query_parameters['$expand'] = self._serialize.query('expand', expand, 'str')
+        response = self._send(http_method='GET',
+                              location_id='608aac0a-32e1-4493-a863-b9cf4566d257',
+                              version='5.1-preview.3',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('Comment', response)
+
+    def get_comments(self, project, work_item_id, top=None, continuation_token=None, include_deleted=None, expand=None):
+        """GetComments.
+        [Preview API] Returns a list of work item comments, pageable.
+        :param str project: Project ID or project name
+        :param int work_item_id: Id of a work item to get comments for.
+        :param int top: Max number of comments to return.
+        :param str continuation_token: Used to query for the next page of comments.
+        :param bool include_deleted: Specify if the deleted comments should be retrieved.
+        :param str expand: Specifies the additional data retrieval options for work item comments.
+        :rtype: :class:`<CommentList> <azure.devops.v5_1.work-item-tracking.models.CommentList>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        query_parameters = {}
+        if top is not None:
+            query_parameters['$top'] = self._serialize.query('top', top, 'int')
+        if continuation_token is not None:
+            query_parameters['continuationToken'] = self._serialize.query('continuation_token', continuation_token, 'str')
+        if include_deleted is not None:
+            query_parameters['includeDeleted'] = self._serialize.query('include_deleted', include_deleted, 'bool')
+        if expand is not None:
+            query_parameters['$expand'] = self._serialize.query('expand', expand, 'str')
+        response = self._send(http_method='GET',
+                              location_id='608aac0a-32e1-4493-a863-b9cf4566d257',
+                              version='5.1-preview.3',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('CommentList', response)
+
+    def get_comments_batch(self, project, work_item_id, ids, include_deleted=None, expand=None):
+        """GetCommentsBatch.
+        [Preview API] Returns a list of work item comments by ids.
+        :param str project: Project ID or project name
+        :param int work_item_id: Id of a work item to get comments for.
+        :param [int] ids: Comma-separated list of comment ids to return.
+        :param bool include_deleted: Specify if the deleted comments should be retrieved.
+        :param str expand: Specifies the additional data retrieval options for work item comments.
+        :rtype: :class:`<CommentList> <azure.devops.v5_1.work-item-tracking.models.CommentList>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        query_parameters = {}
+        if ids is not None:
+            ids = ",".join(map(str, ids))
+            query_parameters['ids'] = self._serialize.query('ids', ids, 'str')
+        if include_deleted is not None:
+            query_parameters['includeDeleted'] = self._serialize.query('include_deleted', include_deleted, 'bool')
+        if expand is not None:
+            query_parameters['$expand'] = self._serialize.query('expand', expand, 'str')
+        response = self._send(http_method='GET',
+                              location_id='608aac0a-32e1-4493-a863-b9cf4566d257',
+                              version='5.1-preview.3',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('CommentList', response)
+
+    def update_comment(self, request, project, work_item_id, comment_id):
+        """UpdateComment.
+        [Preview API] Update a comment on a work item.
+        :param :class:`<CommentUpdate> <azure.devops.v5_1.work_item_tracking.models.CommentUpdate>` request: Comment update request.
+        :param str project: Project ID or project name
+        :param int work_item_id: Id of a work item.
+        :param int comment_id:
+        :rtype: :class:`<Comment> <azure.devops.v5_1.work-item-tracking.models.Comment>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        if comment_id is not None:
+            route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
+        content = self._serialize.body(request, 'CommentUpdate')
+        response = self._send(http_method='PATCH',
+                              location_id='608aac0a-32e1-4493-a863-b9cf4566d257',
+                              version='5.1-preview.3',
+                              route_values=route_values,
+                              content=content)
+        return self._deserialize('Comment', response)
+
+    def create_comment_reaction(self, project, work_item_id, comment_id, reaction_type):
+        """CreateCommentReaction.
+        [Preview API] Adds a new reaction to a comment.
+        :param str project: Project ID or project name
+        :param int work_item_id: WorkItem ID
+        :param int comment_id: Comment ID
+        :param CommentReactionType reaction_type: Type of the reaction
+        :rtype: :class:`<CommentReaction> <azure.devops.v5_1.work-item-tracking.models.CommentReaction>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        if comment_id is not None:
+            route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
+        if reaction_type is not None:
+            route_values['reactionType'] = self._serialize.url('reaction_type', reaction_type, 'CommentReactionType')
+        response = self._send(http_method='PUT',
+                              location_id='f6cb3f27-1028-4851-af96-887e570dc21f',
+                              version='5.1-preview.1',
+                              route_values=route_values)
+        return self._deserialize('CommentReaction', response)
+
+    def delete_comment_reaction(self, project, work_item_id, comment_id, reaction_type):
+        """DeleteCommentReaction.
+        [Preview API] Deletes an existing reaction on a comment.
+        :param str project: Project ID or project name
+        :param int work_item_id: WorkItem ID
+        :param int comment_id: Comment ID
+        :param CommentReactionType reaction_type: Type of the reaction
+        :rtype: :class:`<CommentReaction> <azure.devops.v5_1.work-item-tracking.models.CommentReaction>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        if comment_id is not None:
+            route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
+        if reaction_type is not None:
+            route_values['reactionType'] = self._serialize.url('reaction_type', reaction_type, 'CommentReactionType')
+        response = self._send(http_method='DELETE',
+                              location_id='f6cb3f27-1028-4851-af96-887e570dc21f',
+                              version='5.1-preview.1',
+                              route_values=route_values)
+        return self._deserialize('CommentReaction', response)
+
+    def get_comment_reactions(self, project, work_item_id, comment_id):
+        """GetCommentReactions.
+        [Preview API] Gets reactions of a comment.
+        :param str project: Project ID or project name
+        :param int work_item_id: WorkItem ID
+        :param int comment_id: Comment ID
+        :rtype: [CommentReaction]
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        if comment_id is not None:
+            route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
+        response = self._send(http_method='GET',
+                              location_id='f6cb3f27-1028-4851-af96-887e570dc21f',
+                              version='5.1-preview.1',
+                              route_values=route_values)
+        return self._deserialize('[CommentReaction]', self._unwrap_collection(response))
+
+    def read_reporting_comments(self, project, continuation_token=None, top=None, include_deleted=None, expand=None):
+        """ReadReportingComments.
+        [Preview API]
+        :param str project: Project ID or project name
+        :param str continuation_token:
+        :param int top:
+        :param bool include_deleted:
+        :param str expand:
+        :rtype: :class:`<CommentReportingList> <azure.devops.v5_1.work-item-tracking.models.CommentReportingList>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if continuation_token is not None:
+            query_parameters['continuationToken'] = self._serialize.query('continuation_token', continuation_token, 'str')
+        if top is not None:
+            query_parameters['top'] = self._serialize.query('top', top, 'int')
+        if include_deleted is not None:
+            query_parameters['includeDeleted'] = self._serialize.query('include_deleted', include_deleted, 'bool')
+        if expand is not None:
+            query_parameters['$expand'] = self._serialize.query('expand', expand, 'str')
+        response = self._send(http_method='GET',
+                              location_id='370b8590-9562-42be-b0d8-ac06668fc5dc',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('CommentReportingList', response)
+
+    def get_comment_version(self, project, work_item_id, comment_id, version):
+        """GetCommentVersion.
+        [Preview API]
+        :param str project: Project ID or project name
+        :param int work_item_id:
+        :param int comment_id:
+        :param int version:
+        :rtype: :class:`<CommentVersion> <azure.devops.v5_1.work-item-tracking.models.CommentVersion>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        if comment_id is not None:
+            route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
+        if version is not None:
+            route_values['version'] = self._serialize.url('version', version, 'int')
+        response = self._send(http_method='GET',
+                              location_id='49e03b34-3be0-42e3-8a5d-e8dfb88ac954',
+                              version='5.1-preview.1',
+                              route_values=route_values)
+        return self._deserialize('CommentVersion', response)
+
+    def get_comment_versions(self, project, work_item_id, comment_id):
+        """GetCommentVersions.
+        [Preview API]
+        :param str project: Project ID or project name
+        :param int work_item_id:
+        :param int comment_id:
+        :rtype: [CommentVersion]
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        if work_item_id is not None:
+            route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
+        if comment_id is not None:
+            route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
+        response = self._send(http_method='GET',
+                              location_id='49e03b34-3be0-42e3-8a5d-e8dfb88ac954',
+                              version='5.1-preview.1',
+                              route_values=route_values)
+        return self._deserialize('[CommentVersion]', self._unwrap_collection(response))
+
     def create_field(self, work_item_field, project=None):
         """CreateField.
         [Preview API] Create a new field.
@@ -1243,6 +1541,29 @@ def read_reporting_revisions_post(self, filter, project=None, continuation_token
                               content=content)
         return self._deserialize('ReportingWorkItemRevisionsBatch', response)
 
+    def read_reporting_discussions(self, project=None, continuation_token=None, max_page_size=None):
+        """ReadReportingDiscussions.
+        [Preview API]
+        :param str project: Project ID or project name
+        :param str continuation_token:
+        :param int max_page_size:
+        :rtype: :class:`<ReportingWorkItemRevisionsBatch> <azure.devops.v5_1.work-item-tracking.models.ReportingWorkItemRevisionsBatch>`
+        """
+        route_values = {}
+        if project is not None:
+            route_values['project'] = self._serialize.url('project', project, 'str')
+        query_parameters = {}
+        if continuation_token is not None:
+            query_parameters['continuationToken'] = self._serialize.query('continuation_token', continuation_token, 'str')
+        if max_page_size is not None:
+            query_parameters['$maxPageSize'] = self._serialize.query('max_page_size', max_page_size, 'int')
+        response = self._send(http_method='GET',
+                              location_id='4a644469-90c5-4fcc-9a9f-be0827d369ec',
+                              version='5.1-preview.1',
+                              route_values=route_values,
+                              query_parameters=query_parameters)
+        return self._deserialize('ReportingWorkItemRevisionsBatch', response)
+
     def create_work_item(self, document, project, type, validate_only=None, bypass_rules=None, suppress_notifications=None, expand=None):
         """CreateWorkItem.
         [Preview API] Creates a single work item.
@@ -1310,10 +1631,10 @@ def get_work_item_template(self, project, type, fields=None, as_of=None, expand=
 
     def delete_work_item(self, id, project=None, destroy=None):
         """DeleteWorkItem.
-        [Preview API] Deletes the specified work item and sends it to the Recycle Bin, so that it can be restored back, if required. Optionally, if the destroy parameter has been set to true, it destroys the work item permanently.
+        [Preview API] Deletes the specified work item and sends it to the Recycle Bin, so that it can be restored back, if required. Optionally, if the destroy parameter has been set to true, it destroys the work item permanently. WARNING: If the destroy parameter is set to true, work items deleted by this command will NOT go to recycle-bin and there is no way to restore/recover them after deletion. It is recommended NOT to use this parameter. If you do, please use this parameter with extreme caution.
         :param int id: ID of the work item to be deleted
         :param str project: Project ID or project name
-        :param bool destroy: Optional parameter, if set to true, the work item is deleted permanently
+        :param bool destroy: Optional parameter, if set to true, the work item is deleted permanently. Please note: the destroy action is PERMANENT and cannot be undone.
         :rtype: :class:`<WorkItemDelete> <azure.devops.v5_1.work-item-tracking.models.WorkItemDelete>`
         """
         route_values = {}
diff --git a/azure-devops/azure/devops/v5_1/work_item_tracking_process/models.py b/azure-devops/azure/devops/v5_1/work_item_tracking_process/models.py
index 1378eca2..f70eeb14 100644
--- a/azure-devops/azure/devops/v5_1/work_item_tracking_process/models.py
+++ b/azure-devops/azure/devops/v5_1/work_item_tracking_process/models.py
@@ -364,7 +364,7 @@ def __init__(self, contribution=None, controls=None, height=None, id=None, inher
 class HideStateModel(Model):
     """HideStateModel.
 
-    :param hidden:
+    :param hidden: Returns 'true', if workitem state is hidden, 'false' otherwise.
     :type hidden: bool
     """
 
@@ -822,7 +822,7 @@ class ProcessWorkItemTypeField(Model):
 
     :param allow_groups: Allow setting field value to a group identity. Only applies to identity fields.
     :type allow_groups: bool
-    :param customization:
+    :param customization: Indicates the type of customization on this work item.
     :type customization: object
     :param default_value: The default value of the field.
     :type default_value: object
@@ -1236,9 +1236,9 @@ def __init__(self, behavior_field_id=None, id=None, url=None):
 class WorkItemBehaviorReference(Model):
     """WorkItemBehaviorReference.
 
-    :param id:
+    :param id: The ID of the reference behavior.
     :type id: str
-    :param url:
+    :param url: The url of the reference behavior.
     :type url: str
     """
 
@@ -1284,21 +1284,21 @@ def __init__(self, color=None, name=None, order=None, state_category=None):
 class WorkItemStateResultModel(Model):
     """WorkItemStateResultModel.
 
-    :param color:
+    :param color: Work item state color.
     :type color: str
-    :param customization_type:
+    :param customization_type: Work item state customization type.
     :type customization_type: object
-    :param hidden:
+    :param hidden: If the Work item state is hidden.
     :type hidden: bool
-    :param id:
+    :param id: Id of the Workitemstate.
     :type id: str
-    :param name:
+    :param name: Work item state name.
     :type name: str
-    :param order:
+    :param order: Work item state order.
     :type order: int
-    :param state_category:
+    :param state_category: Work item state statecategory.
     :type state_category: str
-    :param url:
+    :param url: Work item state url.
     :type url: str
     """
 
diff --git a/azure-devops/azure/devops/v5_1/work_item_tracking_process_template/models.py b/azure-devops/azure/devops/v5_1/work_item_tracking_process_template/models.py
index 5272c697..aa39ae9c 100644
--- a/azure-devops/azure/devops/v5_1/work_item_tracking_process_template/models.py
+++ b/azure-devops/azure/devops/v5_1/work_item_tracking_process_template/models.py
@@ -116,6 +116,8 @@ def __init__(self, does_template_exist=None, existing_template_name=None, existi
 class ProcessImportResult(Model):
     """ProcessImportResult.
 
+    :param check_existence_result: Check template existence result.
+    :type check_existence_result: :class:`CheckTemplateExistenceResult <azure.devops.v5_1.work_item_tracking_process_template.models.CheckTemplateExistenceResult>`
     :param help_url: Help URL.
     :type help_url: str
     :param id: ID of the import operation.
@@ -129,6 +131,7 @@ class ProcessImportResult(Model):
     """
 
     _attribute_map = {
+        'check_existence_result': {'key': 'checkExistenceResult', 'type': 'CheckTemplateExistenceResult'},
         'help_url': {'key': 'helpUrl', 'type': 'str'},
         'id': {'key': 'id', 'type': 'str'},
         'is_new': {'key': 'isNew', 'type': 'bool'},
@@ -136,8 +139,9 @@ class ProcessImportResult(Model):
         'validation_results': {'key': 'validationResults', 'type': '[ValidationIssue]'}
     }
 
-    def __init__(self, help_url=None, id=None, is_new=None, promote_job_id=None, validation_results=None):
+    def __init__(self, check_existence_result=None, help_url=None, id=None, is_new=None, promote_job_id=None, validation_results=None):
         super(ProcessImportResult, self).__init__()
+        self.check_existence_result = check_existence_result
         self.help_url = help_url
         self.id = id
         self.is_new = is_new
diff --git a/azure-devops/azure/devops/v5_1/work_item_tracking_process_template/work_item_tracking_process_template_client.py b/azure-devops/azure/devops/v5_1/work_item_tracking_process_template/work_item_tracking_process_template_client.py
index dae246c5..783a7124 100644
--- a/azure-devops/azure/devops/v5_1/work_item_tracking_process_template/work_item_tracking_process_template_client.py
+++ b/azure-devops/azure/devops/v5_1/work_item_tracking_process_template/work_item_tracking_process_template_client.py
@@ -60,27 +60,6 @@ def get_behaviors(self, process_id):
                               route_values=route_values)
         return self._deserialize('[AdminBehavior]', self._unwrap_collection(response))
 
-    def check_template_existence(self, upload_stream, **kwargs):
-        """CheckTemplateExistence.
-        [Preview API] Check if process template exists.
-        :param object upload_stream: Stream to upload
-        :rtype: :class:`<CheckTemplateExistenceResult> <azure.devops.v5_1.work-item-tracking-process-template.models.CheckTemplateExistenceResult>`
-        """
-        route_values = {}
-        route_values['action'] = 'CheckTemplateExistence'
-        if "callback" in kwargs:
-            callback = kwargs["callback"]
-        else:
-            callback = None
-        content = self._client.stream_upload(upload_stream, callback=callback)
-        response = self._send(http_method='POST',
-                              location_id='29e1f38d-9e9c-4358-86a5-cdf9896a5759',
-                              version='5.1-preview.1',
-                              route_values=route_values,
-                              content=content,
-                              media_type='application/octet-stream')
-        return self._deserialize('CheckTemplateExistenceResult', response)
-
     def export_process_template(self, id, **kwargs):
         """ExportProcessTemplate.
         [Preview API] Returns requested process template.
@@ -102,11 +81,12 @@ def export_process_template(self, id, **kwargs):
             callback = None
         return self._client.stream_download(response, callback=callback)
 
-    def import_process_template(self, upload_stream, ignore_warnings=None, **kwargs):
+    def import_process_template(self, upload_stream, ignore_warnings=None, replace_existing_template=None, **kwargs):
         """ImportProcessTemplate.
         [Preview API] Imports a process from zip file.
         :param object upload_stream: Stream to upload
-        :param bool ignore_warnings: Default value is false
+        :param bool ignore_warnings: Ignores validation warnings. Default value is false.
+        :param bool replace_existing_template: Replaces the existing template. Default value is true.
         :rtype: :class:`<ProcessImportResult> <azure.devops.v5_1.work-item-tracking-process-template.models.ProcessImportResult>`
         """
         route_values = {}
@@ -114,6 +94,8 @@ def import_process_template(self, upload_stream, ignore_warnings=None, **kwargs)
         query_parameters = {}
         if ignore_warnings is not None:
             query_parameters['ignoreWarnings'] = self._serialize.query('ignore_warnings', ignore_warnings, 'bool')
+        if replace_existing_template is not None:
+            query_parameters['replaceExistingTemplate'] = self._serialize.query('replace_existing_template', replace_existing_template, 'bool')
         if "callback" in kwargs:
             callback = kwargs["callback"]
         else: