diff --git a/packages/google-cloud-vision/src/v1/image_annotator_client.js b/packages/google-cloud-vision/src/v1/image_annotator_client.js
index 65a44231a47..7147be4e4dc 100644
--- a/packages/google-cloud-vision/src/v1/image_annotator_client.js
+++ b/packages/google-cloud-vision/src/v1/image_annotator_client.js
@@ -302,20 +302,14 @@ class ImageAnnotatorClient {
    * // Handle the operation using the promise pattern.
    * client.asyncBatchAnnotateFiles({requests: requests})
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
-   *     // The final result of the operation.
    *     const result = responses[0];
-   *
-   *     // The metadata value of the completed operation.
    *     const metadata = responses[1];
-   *
-   *     // The response of the api call returning the complete operation.
    *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
@@ -327,8 +321,7 @@ class ImageAnnotatorClient {
    * // Handle the operation using the event emitter pattern.
    * client.asyncBatchAnnotateFiles({requests: requests})
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-vision/src/v1/product_search_client.js b/packages/google-cloud-vision/src/v1/product_search_client.js
index c821079ea74..cfd3c2527ba 100644
--- a/packages/google-cloud-vision/src/v1/product_search_client.js
+++ b/packages/google-cloud-vision/src/v1/product_search_client.js
@@ -411,7 +411,7 @@ class ProductSearchClient {
    * client.listProducts({parent: formattedParent})
    *   .then(responses => {
    *     const resources = responses[0];
-   *     for (let i = 0; i < resources.length; i += 1) {
+   *     for (const resource of resources) {
    *       // doThingsWith(resources[i])
    *     }
    *   })
@@ -431,7 +431,7 @@ class ProductSearchClient {
    *   const nextRequest = responses[1];
    *   // The actual response object, if necessary.
    *   // const rawResponse = responses[2];
-   *   for (let i = 0; i < resources.length; i += 1) {
+   *   for (const resource of resources) {
    *     // doThingsWith(resources[i]);
    *   }
    *   if (nextRequest) {
@@ -745,7 +745,7 @@ class ProductSearchClient {
    * client.listReferenceImages({parent: formattedParent})
    *   .then(responses => {
    *     const resources = responses[0];
-   *     for (let i = 0; i < resources.length; i += 1) {
+   *     for (const resource of resources) {
    *       // doThingsWith(resources[i])
    *     }
    *   })
@@ -765,7 +765,7 @@ class ProductSearchClient {
    *   const nextRequest = responses[1];
    *   // The actual response object, if necessary.
    *   // const rawResponse = responses[2];
-   *   for (let i = 0; i < resources.length; i += 1) {
+   *   for (const resource of resources) {
    *     // doThingsWith(resources[i]);
    *   }
    *   if (nextRequest) {
@@ -1159,7 +1159,7 @@ class ProductSearchClient {
    * client.listProductSets({parent: formattedParent})
    *   .then(responses => {
    *     const resources = responses[0];
-   *     for (let i = 0; i < resources.length; i += 1) {
+   *     for (const resource of resources) {
    *       // doThingsWith(resources[i])
    *     }
    *   })
@@ -1179,7 +1179,7 @@ class ProductSearchClient {
    *   const nextRequest = responses[1];
    *   // The actual response object, if necessary.
    *   // const rawResponse = responses[2];
-   *   for (let i = 0; i < resources.length; i += 1) {
+   *   for (const resource of resources) {
    *     // doThingsWith(resources[i]);
    *   }
    *   if (nextRequest) {
@@ -1603,7 +1603,7 @@ class ProductSearchClient {
    * client.listProductsInProductSet({name: formattedName})
    *   .then(responses => {
    *     const resources = responses[0];
-   *     for (let i = 0; i < resources.length; i += 1) {
+   *     for (const resource of resources) {
    *       // doThingsWith(resources[i])
    *     }
    *   })
@@ -1623,7 +1623,7 @@ class ProductSearchClient {
    *   const nextRequest = responses[1];
    *   // The actual response object, if necessary.
    *   // const rawResponse = responses[2];
-   *   for (let i = 0; i < resources.length; i += 1) {
+   *   for (const resource of resources) {
    *     // doThingsWith(resources[i]);
    *   }
    *   if (nextRequest) {
@@ -1761,20 +1761,14 @@ class ProductSearchClient {
    * // Handle the operation using the promise pattern.
    * client.importProductSets(request)
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
-   *     // The final result of the operation.
    *     const result = responses[0];
-   *
-   *     // The metadata value of the completed operation.
    *     const metadata = responses[1];
-   *
-   *     // The response of the api call returning the complete operation.
    *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
@@ -1791,8 +1785,7 @@ class ProductSearchClient {
    * // Handle the operation using the event emitter pattern.
    * client.importProductSets(request)
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-vision/src/v1p2beta1/image_annotator_client.js b/packages/google-cloud-vision/src/v1p2beta1/image_annotator_client.js
index 68c8e470edf..2487c0568e7 100644
--- a/packages/google-cloud-vision/src/v1p2beta1/image_annotator_client.js
+++ b/packages/google-cloud-vision/src/v1p2beta1/image_annotator_client.js
@@ -302,20 +302,14 @@ class ImageAnnotatorClient {
    * // Handle the operation using the promise pattern.
    * client.asyncBatchAnnotateFiles({requests: requests})
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
-   *     // The final result of the operation.
    *     const result = responses[0];
-   *
-   *     // The metadata value of the completed operation.
    *     const metadata = responses[1];
-   *
-   *     // The response of the api call returning the complete operation.
    *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
@@ -327,8 +321,7 @@ class ImageAnnotatorClient {
    * // Handle the operation using the event emitter pattern.
    * client.asyncBatchAnnotateFiles({requests: requests})
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-vision/src/v1p3beta1/image_annotator_client.js b/packages/google-cloud-vision/src/v1p3beta1/image_annotator_client.js
index 8ac392b48e3..27fdc16ccf5 100644
--- a/packages/google-cloud-vision/src/v1p3beta1/image_annotator_client.js
+++ b/packages/google-cloud-vision/src/v1p3beta1/image_annotator_client.js
@@ -302,20 +302,14 @@ class ImageAnnotatorClient {
    * // Handle the operation using the promise pattern.
    * client.asyncBatchAnnotateFiles({requests: requests})
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
-   *     // The final result of the operation.
    *     const result = responses[0];
-   *
-   *     // The metadata value of the completed operation.
    *     const metadata = responses[1];
-   *
-   *     // The response of the api call returning the complete operation.
    *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
@@ -327,8 +321,7 @@ class ImageAnnotatorClient {
    * // Handle the operation using the event emitter pattern.
    * client.asyncBatchAnnotateFiles({requests: requests})
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-vision/src/v1p3beta1/product_search_client.js b/packages/google-cloud-vision/src/v1p3beta1/product_search_client.js
index 25c4e241195..f260a61b4e0 100644
--- a/packages/google-cloud-vision/src/v1p3beta1/product_search_client.js
+++ b/packages/google-cloud-vision/src/v1p3beta1/product_search_client.js
@@ -410,7 +410,7 @@ class ProductSearchClient {
    * client.listProductSets({parent: formattedParent})
    *   .then(responses => {
    *     const resources = responses[0];
-   *     for (let i = 0; i < resources.length; i += 1) {
+   *     for (const resource of resources) {
    *       // doThingsWith(resources[i])
    *     }
    *   })
@@ -430,7 +430,7 @@ class ProductSearchClient {
    *   const nextRequest = responses[1];
    *   // The actual response object, if necessary.
    *   // const rawResponse = responses[2];
-   *   for (let i = 0; i < resources.length; i += 1) {
+   *   for (const resource of resources) {
    *     // doThingsWith(resources[i]);
    *   }
    *   if (nextRequest) {
@@ -808,7 +808,7 @@ class ProductSearchClient {
    * client.listProducts({parent: formattedParent})
    *   .then(responses => {
    *     const resources = responses[0];
-   *     for (let i = 0; i < resources.length; i += 1) {
+   *     for (const resource of resources) {
    *       // doThingsWith(resources[i])
    *     }
    *   })
@@ -828,7 +828,7 @@ class ProductSearchClient {
    *   const nextRequest = responses[1];
    *   // The actual response object, if necessary.
    *   // const rawResponse = responses[2];
-   *   for (let i = 0; i < resources.length; i += 1) {
+   *   for (const resource of resources) {
    *     // doThingsWith(resources[i]);
    *   }
    *   if (nextRequest) {
@@ -1282,7 +1282,7 @@ class ProductSearchClient {
    * client.listReferenceImages({parent: formattedParent})
    *   .then(responses => {
    *     const resources = responses[0];
-   *     for (let i = 0; i < resources.length; i += 1) {
+   *     for (const resource of resources) {
    *       // doThingsWith(resources[i])
    *     }
    *   })
@@ -1302,7 +1302,7 @@ class ProductSearchClient {
    *   const nextRequest = responses[1];
    *   // The actual response object, if necessary.
    *   // const rawResponse = responses[2];
-   *   for (let i = 0; i < resources.length; i += 1) {
+   *   for (const resource of resources) {
    *     // doThingsWith(resources[i]);
    *   }
    *   if (nextRequest) {
@@ -1618,7 +1618,7 @@ class ProductSearchClient {
    * client.listProductsInProductSet({name: formattedName})
    *   .then(responses => {
    *     const resources = responses[0];
-   *     for (let i = 0; i < resources.length; i += 1) {
+   *     for (const resource of resources) {
    *       // doThingsWith(resources[i])
    *     }
    *   })
@@ -1638,7 +1638,7 @@ class ProductSearchClient {
    *   const nextRequest = responses[1];
    *   // The actual response object, if necessary.
    *   // const rawResponse = responses[2];
-   *   for (let i = 0; i < resources.length; i += 1) {
+   *   for (const resource of resources) {
    *     // doThingsWith(resources[i]);
    *   }
    *   if (nextRequest) {
@@ -1776,20 +1776,14 @@ class ProductSearchClient {
    * // Handle the operation using the promise pattern.
    * client.importProductSets(request)
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
-   *     // The final result of the operation.
    *     const result = responses[0];
-   *
-   *     // The metadata value of the completed operation.
    *     const metadata = responses[1];
-   *
-   *     // The response of the api call returning the complete operation.
    *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
@@ -1806,8 +1800,7 @@ class ProductSearchClient {
    * // Handle the operation using the event emitter pattern.
    * client.importProductSets(request)
    *   .then(responses => {
-   *     const operation = responses[0];
-   *     const initialApiResponse = responses[1];
+   *     const [operation, initialApiResponse] = responses;
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-vision/synth.metadata b/packages/google-cloud-vision/synth.metadata
index 2ac04e59c1f..cd926baa72b 100644
--- a/packages/google-cloud-vision/synth.metadata
+++ b/packages/google-cloud-vision/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-01-17T12:47:29.238091Z",
+  "updateTime": "2019-02-02T12:27:39.142556Z",
   "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"
       }
     },
     {