diff --git a/google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableInstanceAdminClient.java b/google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableInstanceAdminClient.java
index bb51e111379d..45dc3b20eb15 100644
--- a/google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableInstanceAdminClient.java
+++ b/google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableInstanceAdminClient.java
@@ -345,7 +345,7 @@ public final OperationFuture<Instance, CreateInstanceMetadata> createInstanceAsy
    *     .setInstance(instance)
    *     .putAllClusters(clusters)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = baseBigtableInstanceAdminClient.createInstanceOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Instance, CreateInstanceMetadata&gt; future = baseBigtableInstanceAdminClient.createInstanceOperationCallable().futureCall(request);
    *   // Do something
    *   Instance response = future.get();
    * }
@@ -645,7 +645,7 @@ public final OperationFuture<Instance, UpdateInstanceMetadata> partialUpdateInst
    *     .setInstance(instance)
    *     .setUpdateMask(updateMask)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = baseBigtableInstanceAdminClient.partialUpdateInstanceOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Instance, UpdateInstanceMetadata&gt; future = baseBigtableInstanceAdminClient.partialUpdateInstanceOperationCallable().futureCall(request);
    *   // Do something
    *   Instance response = future.get();
    * }
@@ -892,7 +892,7 @@ public final OperationFuture<Cluster, CreateClusterMetadata> createClusterAsync(
    *     .setClusterId(clusterId)
    *     .setCluster(cluster)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = baseBigtableInstanceAdminClient.createClusterOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Cluster, CreateClusterMetadata&gt; future = baseBigtableInstanceAdminClient.createClusterOperationCallable().futureCall(request);
    *   // Do something
    *   Cluster response = future.get();
    * }
@@ -1161,7 +1161,7 @@ public final OperationFuture<Cluster, UpdateClusterMetadata> updateClusterAsync(
    *     .setName(name.toString())
    *     .setServeNodes(serveNodes)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = baseBigtableInstanceAdminClient.updateClusterOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Cluster, UpdateClusterMetadata&gt; future = baseBigtableInstanceAdminClient.updateClusterOperationCallable().futureCall(request);
    *   // Do something
    *   Cluster response = future.get();
    * }
@@ -1715,7 +1715,7 @@ public final OperationFuture<AppProfile, UpdateAppProfileMetadata> updateAppProf
    *     .setAppProfile(appProfile)
    *     .setUpdateMask(updateMask)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = baseBigtableInstanceAdminClient.updateAppProfileOperationCallable().futureCall(request);
+   *   OperationFuture&lt;AppProfile, UpdateAppProfileMetadata&gt; future = baseBigtableInstanceAdminClient.updateAppProfileOperationCallable().futureCall(request);
    *   // Do something
    *   AppProfile response = future.get();
    * }
diff --git a/google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableTableAdminClient.java b/google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableTableAdminClient.java
index cab11901a522..25ba1c283c43 100644
--- a/google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableTableAdminClient.java
+++ b/google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableTableAdminClient.java
@@ -470,7 +470,7 @@ public final OperationFuture<Table, CreateTableFromSnapshotMetadata> createTable
    *     .setTableId(tableId)
    *     .setSourceSnapshot(sourceSnapshot.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = baseBigtableTableAdminClient.createTableFromSnapshotOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Table, CreateTableFromSnapshotMetadata&gt; future = baseBigtableTableAdminClient.createTableFromSnapshotOperationCallable().futureCall(request);
    *   // Do something
    *   Table response = future.get();
    * }
@@ -1370,7 +1370,7 @@ public final OperationFuture<Snapshot, SnapshotTableMetadata> snapshotTableAsync
    *     .setSnapshotId(snapshotId.toString())
    *     .setDescription(description)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = baseBigtableTableAdminClient.snapshotTableOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Snapshot, SnapshotTableMetadata&gt; future = baseBigtableTableAdminClient.snapshotTableOperationCallable().futureCall(request);
    *   // Do something
    *   Snapshot response = future.get();
    * }
diff --git a/google-cloud-clients/google-cloud-bigtable/synth.metadata b/google-cloud-clients/google-cloud-bigtable/synth.metadata
index 1530c0474e8d..3699533b24e3 100644
--- a/google-cloud-clients/google-cloud-bigtable/synth.metadata
+++ b/google-cloud-clients/google-cloud-bigtable/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-01-17T08:36:21.634857Z",
+  "updateTime": "2019-02-02T08:34:53.521732Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.6",
-        "dockerImage": "googleapis/artman@sha256:12722f2ca3fbc3b53cc6aa5f0e569d7d221b46bd876a2136497089dec5e3634e"
+        "version": "0.16.8",
+        "dockerImage": "googleapis/artman@sha256:75bc07ef34a1de9895c18af54dc503ed3b3f3b52e85062e3360a979d2a0741e7"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "0ac60e21a1aa86c07c1836865b35308ba8178b05",
-        "internalRef": "229626798"
+        "sha": "bce093dab3e65c40eb9a37efbdc960f34df6037a",
+        "internalRef": "231974277"
       }
     }
   ],