From 240165c44567428bda3564e0933c17734cd80b76 Mon Sep 17 00:00:00 2001
From: DPE bot <dpebot@google.com>
Date: Fri, 14 Sep 2018 08:40:50 -0700
Subject: [PATCH] Switch to let/const (#97)

---
 .../v1/doc_video_intelligence.js              | 48 ++++++++---------
 .../doc/google/longrunning/doc_operations.js  | 12 ++---
 .../src/v1/doc/google/protobuf/doc_any.js     |  2 +-
 .../v1/doc/google/protobuf/doc_duration.js    |  2 +-
 .../src/v1/doc/google/rpc/doc_status.js       |  2 +-
 .../v1/video_intelligence_service_client.js   | 52 +++++++++----------
 .../v1beta1/doc_video_intelligence.js         | 34 ++++++------
 .../doc/google/longrunning/doc_operations.js  | 12 ++---
 .../v1beta1/doc/google/protobuf/doc_any.js    |  2 +-
 .../src/v1beta1/doc/google/rpc/doc_status.js  |  2 +-
 .../video_intelligence_service_client.js      | 52 +++++++++----------
 .../v1beta2/doc_video_intelligence.js         | 48 ++++++++---------
 .../doc/google/longrunning/doc_operations.js  | 12 ++---
 .../v1beta2/doc/google/protobuf/doc_any.js    |  2 +-
 .../doc/google/protobuf/doc_duration.js       |  2 +-
 .../src/v1beta2/doc/google/rpc/doc_status.js  |  2 +-
 .../video_intelligence_service_client.js      | 52 +++++++++----------
 .../v1p1beta1/doc_video_intelligence.js       | 48 ++++++++---------
 .../doc/google/longrunning/doc_operations.js  | 12 ++---
 .../v1p1beta1/doc/google/protobuf/doc_any.js  |  2 +-
 .../doc/google/protobuf/doc_duration.js       |  2 +-
 .../v1p1beta1/doc/google/rpc/doc_status.js    |  2 +-
 .../video_intelligence_service_client.js      | 52 +++++++++----------
 .../test/gapic-v1.js                          | 34 ++++++------
 .../test/gapic-v1beta1.js                     | 34 ++++++------
 .../test/gapic-v1beta2.js                     | 34 ++++++------
 .../test/gapic-v1p1beta1.js                   | 34 ++++++------
 27 files changed, 296 insertions(+), 296 deletions(-)

diff --git a/packages/google-cloud-videointelligence/src/v1/doc/google/cloud/videointelligence/v1/doc_video_intelligence.js b/packages/google-cloud-videointelligence/src/v1/doc/google/cloud/videointelligence/v1/doc_video_intelligence.js
index c882a671cc3..d8dce9b8e51 100644
--- a/packages/google-cloud-videointelligence/src/v1/doc/google/cloud/videointelligence/v1/doc_video_intelligence.js
+++ b/packages/google-cloud-videointelligence/src/v1/doc/google/cloud/videointelligence/v1/doc_video_intelligence.js
@@ -62,7 +62,7 @@
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.AnnotateVideoRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var AnnotateVideoRequest = {
+const AnnotateVideoRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -100,7 +100,7 @@ var AnnotateVideoRequest = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.VideoContext definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var VideoContext = {
+const VideoContext = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -128,7 +128,7 @@ var VideoContext = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.LabelDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var LabelDetectionConfig = {
+const LabelDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -144,7 +144,7 @@ var LabelDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.ShotChangeDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var ShotChangeDetectionConfig = {
+const ShotChangeDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -160,7 +160,7 @@ var ShotChangeDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.ExplicitContentDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var ExplicitContentDetectionConfig = {
+const ExplicitContentDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -179,7 +179,7 @@ var ExplicitContentDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.FaceDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var FaceDetectionConfig = {
+const FaceDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -202,7 +202,7 @@ var FaceDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.VideoSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var VideoSegment = {
+const VideoSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -221,7 +221,7 @@ var VideoSegment = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.LabelSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var LabelSegment = {
+const LabelSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -241,7 +241,7 @@ var LabelSegment = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.LabelFrame definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var LabelFrame = {
+const LabelFrame = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -263,7 +263,7 @@ var LabelFrame = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.Entity definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var Entity = {
+const Entity = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -297,7 +297,7 @@ var Entity = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.LabelAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var LabelAnnotation = {
+const LabelAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -319,7 +319,7 @@ var LabelAnnotation = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.ExplicitContentFrame definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var ExplicitContentFrame = {
+const ExplicitContentFrame = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -337,7 +337,7 @@ var ExplicitContentFrame = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.ExplicitContentAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var ExplicitContentAnnotation = {
+const ExplicitContentAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -362,7 +362,7 @@ var ExplicitContentAnnotation = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.NormalizedBoundingBox definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var NormalizedBoundingBox = {
+const NormalizedBoundingBox = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -378,7 +378,7 @@ var NormalizedBoundingBox = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.FaceSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var FaceSegment = {
+const FaceSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -402,7 +402,7 @@ var FaceSegment = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.FaceFrame definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var FaceFrame = {
+const FaceFrame = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -426,7 +426,7 @@ var FaceFrame = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.FaceAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var FaceAnnotation = {
+const FaceAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -480,7 +480,7 @@ var FaceAnnotation = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.VideoAnnotationResults definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var VideoAnnotationResults = {
+const VideoAnnotationResults = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -498,7 +498,7 @@ var VideoAnnotationResults = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.AnnotateVideoResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var AnnotateVideoResponse = {
+const AnnotateVideoResponse = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -527,7 +527,7 @@ var AnnotateVideoResponse = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.VideoAnnotationProgress definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var VideoAnnotationProgress = {
+const VideoAnnotationProgress = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -545,7 +545,7 @@ var VideoAnnotationProgress = {
  * @memberof google.cloud.videointelligence.v1
  * @see [google.cloud.videointelligence.v1.AnnotateVideoProgress definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1/video_intelligence.proto}
  */
-var AnnotateVideoProgress = {
+const AnnotateVideoProgress = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -555,7 +555,7 @@ var AnnotateVideoProgress = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1
  */
-var Feature = {
+const Feature = {
 
   /**
    * Unspecified.
@@ -589,7 +589,7 @@ var Feature = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1
  */
-var LabelDetectionMode = {
+const LabelDetectionMode = {
 
   /**
    * Unspecified.
@@ -618,7 +618,7 @@ var LabelDetectionMode = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1
  */
-var Likelihood = {
+const Likelihood = {
 
   /**
    * Unspecified likelihood.
diff --git a/packages/google-cloud-videointelligence/src/v1/doc/google/longrunning/doc_operations.js b/packages/google-cloud-videointelligence/src/v1/doc/google/longrunning/doc_operations.js
index 79ef6344437..4af5d7d3574 100644
--- a/packages/google-cloud-videointelligence/src/v1/doc/google/longrunning/doc_operations.js
+++ b/packages/google-cloud-videointelligence/src/v1/doc/google/longrunning/doc_operations.js
@@ -58,7 +58,7 @@
  * @memberof google.longrunning
  * @see [google.longrunning.Operation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var Operation = {
+const Operation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -72,7 +72,7 @@ var Operation = {
  * @memberof google.longrunning
  * @see [google.longrunning.GetOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var GetOperationRequest = {
+const GetOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -95,7 +95,7 @@ var GetOperationRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.ListOperationsRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var ListOperationsRequest = {
+const ListOperationsRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -114,7 +114,7 @@ var ListOperationsRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.ListOperationsResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var ListOperationsResponse = {
+const ListOperationsResponse = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -128,7 +128,7 @@ var ListOperationsResponse = {
  * @memberof google.longrunning
  * @see [google.longrunning.CancelOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var CancelOperationRequest = {
+const CancelOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -142,6 +142,6 @@ var CancelOperationRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.DeleteOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var DeleteOperationRequest = {
+const DeleteOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1/doc/google/protobuf/doc_any.js b/packages/google-cloud-videointelligence/src/v1/doc/google/protobuf/doc_any.js
index c5c5bbafa23..3accb1fc0d8 100644
--- a/packages/google-cloud-videointelligence/src/v1/doc/google/protobuf/doc_any.js
+++ b/packages/google-cloud-videointelligence/src/v1/doc/google/protobuf/doc_any.js
@@ -131,6 +131,6 @@
  * @memberof google.protobuf
  * @see [google.protobuf.Any definition in proto format]{@link https://github.com/google/protobuf/blob/master/src/google/protobuf/any.proto}
  */
-var Any = {
+const Any = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1/doc/google/protobuf/doc_duration.js b/packages/google-cloud-videointelligence/src/v1/doc/google/protobuf/doc_duration.js
index 3ea5c376abb..c03ce2fb3df 100644
--- a/packages/google-cloud-videointelligence/src/v1/doc/google/protobuf/doc_duration.js
+++ b/packages/google-cloud-videointelligence/src/v1/doc/google/protobuf/doc_duration.js
@@ -92,6 +92,6 @@
  * @memberof google.protobuf
  * @see [google.protobuf.Duration definition in proto format]{@link https://github.com/google/protobuf/blob/master/src/google/protobuf/duration.proto}
  */
-var Duration = {
+const Duration = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1/doc/google/rpc/doc_status.js b/packages/google-cloud-videointelligence/src/v1/doc/google/rpc/doc_status.js
index 7122f1682e0..13cfcab1021 100644
--- a/packages/google-cloud-videointelligence/src/v1/doc/google/rpc/doc_status.js
+++ b/packages/google-cloud-videointelligence/src/v1/doc/google/rpc/doc_status.js
@@ -87,6 +87,6 @@
  * @memberof google.rpc
  * @see [google.rpc.Status definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/rpc/status.proto}
  */
-var Status = {
+const Status = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1/video_intelligence_service_client.js b/packages/google-cloud-videointelligence/src/v1/video_intelligence_service_client.js
index 59a23d41e8f..6ed0c6467e6 100644
--- a/packages/google-cloud-videointelligence/src/v1/video_intelligence_service_client.js
+++ b/packages/google-cloud-videointelligence/src/v1/video_intelligence_service_client.js
@@ -72,13 +72,13 @@ class VideoIntelligenceServiceClient {
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
     opts.scopes = this.constructor.scopes;
-    var gaxGrpc = new gax.GrpcClient(opts);
+    const gaxGrpc = new gax.GrpcClient(opts);
 
     // Save the auth object to the client, for use by other methods.
     this.auth = gaxGrpc.auth;
 
     // Determine the client header string.
-    var clientHeader = [
+    const clientHeader = [
       `gl-node/${process.version}`,
       `grpc/${gaxGrpc.grpcVersion}`,
       `gax/${gax.version}`,
@@ -89,14 +89,14 @@ class VideoIntelligenceServiceClient {
     }
 
     // Load the applicable protos.
-    var protos = merge(
+    const protos = merge(
       {},
       gaxGrpc.loadProto(
         path.join(__dirname, '..', '..', 'protos'),
         'google/cloud/videointelligence/v1/video_intelligence.proto'
       )
     );
-    var protoFilesRoot = new gax.GoogleProtoFilesRoot();
+    let protoFilesRoot = new gax.GoogleProtoFilesRoot();
     protoFilesRoot = protobuf.loadSync(
       path.join(
         __dirname,
@@ -116,10 +116,10 @@ class VideoIntelligenceServiceClient {
       grpc: gaxGrpc.grpc,
     }).operationsClient(opts);
 
-    var annotateVideoResponse = protoFilesRoot.lookup(
+    const annotateVideoResponse = protoFilesRoot.lookup(
       'google.cloud.videointelligence.v1.AnnotateVideoResponse'
     );
-    var annotateVideoMetadata = protoFilesRoot.lookup(
+    const annotateVideoMetadata = protoFilesRoot.lookup(
       'google.cloud.videointelligence.v1.AnnotateVideoProgress'
     );
 
@@ -132,7 +132,7 @@ class VideoIntelligenceServiceClient {
     };
 
     // Put together the default options sent with requests.
-    var defaults = gaxGrpc.constructSettings(
+    const defaults = gaxGrpc.constructSettings(
       'google.cloud.videointelligence.v1.VideoIntelligenceService',
       gapicConfig,
       opts.clientConfig,
@@ -146,20 +146,20 @@ class VideoIntelligenceServiceClient {
 
     // Put together the "service stub" for
     // google.cloud.videointelligence.v1.VideoIntelligenceService.
-    var videoIntelligenceServiceStub = gaxGrpc.createStub(
+    const videoIntelligenceServiceStub = gaxGrpc.createStub(
       protos.google.cloud.videointelligence.v1.VideoIntelligenceService,
       opts
     );
 
     // Iterate over each of the methods that the service provides
     // and create an API call method for each.
-    var videoIntelligenceServiceStubMethods = ['annotateVideo'];
+    const videoIntelligenceServiceStubMethods = ['annotateVideo'];
     for (let methodName of videoIntelligenceServiceStubMethods) {
       this._innerApiCalls[methodName] = gax.createApiCall(
         videoIntelligenceServiceStub.then(
           stub =>
             function() {
-              var args = Array.prototype.slice.call(arguments, 0);
+              const args = Array.prototype.slice.call(arguments, 0);
               return stub[methodName].apply(stub, args);
             }
         ),
@@ -261,14 +261,14 @@ class VideoIntelligenceServiceClient {
    *
    * const videoIntelligence = require('@google-cloud/video-intelligence');
    *
-   * var client = new videoIntelligence.v1.VideoIntelligenceServiceClient({
+   * const client = new videoIntelligence.v1.VideoIntelligenceServiceClient({
    *   // optional auth parameters.
    * });
    *
-   * var inputUri = 'gs://demomaker/cat.mp4';
-   * var featuresElement = 'LABEL_DETECTION';
-   * var features = [featuresElement];
-   * var request = {
+   * const inputUri = 'gs://demomaker/cat.mp4';
+   * const featuresElement = 'LABEL_DETECTION';
+   * const features = [featuresElement];
+   * const request = {
    *   inputUri: inputUri,
    *   features: features,
    * };
@@ -276,30 +276,30 @@ class VideoIntelligenceServiceClient {
    * // Handle the operation using the promise pattern.
    * client.annotateVideo(request)
    *   .then(responses => {
-   *     var operation = responses[0];
-   *     var initialApiResponse = responses[1];
+   *     const operation = responses[0];
+   *     const initialApiResponse = responses[1];
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
    *     // The final result of the operation.
-   *     var result = responses[0];
+   *     const result = responses[0];
    *
    *     // The metadata value of the completed operation.
-   *     var metadata = responses[1];
+   *     const metadata = responses[1];
    *
    *     // The response of the api call returning the complete operation.
-   *     var finalApiResponse = responses[2];
+   *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
    *     console.error(err);
    *   });
    *
-   * var inputUri = 'gs://demomaker/cat.mp4';
-   * var featuresElement = 'LABEL_DETECTION';
-   * var features = [featuresElement];
-   * var request = {
+   * const inputUri = 'gs://demomaker/cat.mp4';
+   * const featuresElement = 'LABEL_DETECTION';
+   * const features = [featuresElement];
+   * const request = {
    *   inputUri: inputUri,
    *   features: features,
    * };
@@ -307,8 +307,8 @@ class VideoIntelligenceServiceClient {
    * // Handle the operation using the event emitter pattern.
    * client.annotateVideo(request)
    *   .then(responses => {
-   *     var operation = responses[0];
-   *     var initialApiResponse = responses[1];
+   *     const operation = responses[0];
+   *     const initialApiResponse = responses[1];
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-videointelligence/src/v1beta1/doc/google/cloud/videointelligence/v1beta1/doc_video_intelligence.js b/packages/google-cloud-videointelligence/src/v1beta1/doc/google/cloud/videointelligence/v1beta1/doc_video_intelligence.js
index 2d10356f406..01e20f52221 100644
--- a/packages/google-cloud-videointelligence/src/v1beta1/doc/google/cloud/videointelligence/v1beta1/doc_video_intelligence.js
+++ b/packages/google-cloud-videointelligence/src/v1beta1/doc/google/cloud/videointelligence/v1beta1/doc_video_intelligence.js
@@ -61,7 +61,7 @@
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.AnnotateVideoRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var AnnotateVideoRequest = {
+const AnnotateVideoRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -106,7 +106,7 @@ var AnnotateVideoRequest = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.VideoContext definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var VideoContext = {
+const VideoContext = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -123,7 +123,7 @@ var VideoContext = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.VideoSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var VideoSegment = {
+const VideoSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -150,7 +150,7 @@ var VideoSegment = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.LabelLocation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var LabelLocation = {
+const LabelLocation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -172,7 +172,7 @@ var LabelLocation = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.LabelAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var LabelAnnotation = {
+const LabelAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -216,7 +216,7 @@ var LabelAnnotation = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.SafeSearchAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var SafeSearchAnnotation = {
+const SafeSearchAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -239,7 +239,7 @@ var SafeSearchAnnotation = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.BoundingBox definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var BoundingBox = {
+const BoundingBox = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -258,7 +258,7 @@ var BoundingBox = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.FaceLocation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var FaceLocation = {
+const FaceLocation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -284,7 +284,7 @@ var FaceLocation = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.FaceAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var FaceAnnotation = {
+const FaceAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -325,7 +325,7 @@ var FaceAnnotation = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.VideoAnnotationResults definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var VideoAnnotationResults = {
+const VideoAnnotationResults = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -343,7 +343,7 @@ var VideoAnnotationResults = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.AnnotateVideoResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var AnnotateVideoResponse = {
+const AnnotateVideoResponse = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -372,7 +372,7 @@ var AnnotateVideoResponse = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.VideoAnnotationProgress definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var VideoAnnotationProgress = {
+const VideoAnnotationProgress = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -390,7 +390,7 @@ var VideoAnnotationProgress = {
  * @memberof google.cloud.videointelligence.v1beta1
  * @see [google.cloud.videointelligence.v1beta1.AnnotateVideoProgress definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta1/video_intelligence.proto}
  */
-var AnnotateVideoProgress = {
+const AnnotateVideoProgress = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -400,7 +400,7 @@ var AnnotateVideoProgress = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1beta1
  */
-var Feature = {
+const Feature = {
 
   /**
    * Unspecified.
@@ -434,7 +434,7 @@ var Feature = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1beta1
  */
-var LabelLevel = {
+const LabelLevel = {
 
   /**
    * Unspecified.
@@ -469,7 +469,7 @@ var LabelLevel = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1beta1
  */
-var LabelDetectionMode = {
+const LabelDetectionMode = {
 
   /**
    * Unspecified.
@@ -498,7 +498,7 @@ var LabelDetectionMode = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1beta1
  */
-var Likelihood = {
+const Likelihood = {
 
   /**
    * Unknown likelihood.
diff --git a/packages/google-cloud-videointelligence/src/v1beta1/doc/google/longrunning/doc_operations.js b/packages/google-cloud-videointelligence/src/v1beta1/doc/google/longrunning/doc_operations.js
index 79ef6344437..4af5d7d3574 100644
--- a/packages/google-cloud-videointelligence/src/v1beta1/doc/google/longrunning/doc_operations.js
+++ b/packages/google-cloud-videointelligence/src/v1beta1/doc/google/longrunning/doc_operations.js
@@ -58,7 +58,7 @@
  * @memberof google.longrunning
  * @see [google.longrunning.Operation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var Operation = {
+const Operation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -72,7 +72,7 @@ var Operation = {
  * @memberof google.longrunning
  * @see [google.longrunning.GetOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var GetOperationRequest = {
+const GetOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -95,7 +95,7 @@ var GetOperationRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.ListOperationsRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var ListOperationsRequest = {
+const ListOperationsRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -114,7 +114,7 @@ var ListOperationsRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.ListOperationsResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var ListOperationsResponse = {
+const ListOperationsResponse = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -128,7 +128,7 @@ var ListOperationsResponse = {
  * @memberof google.longrunning
  * @see [google.longrunning.CancelOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var CancelOperationRequest = {
+const CancelOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -142,6 +142,6 @@ var CancelOperationRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.DeleteOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var DeleteOperationRequest = {
+const DeleteOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1beta1/doc/google/protobuf/doc_any.js b/packages/google-cloud-videointelligence/src/v1beta1/doc/google/protobuf/doc_any.js
index c5c5bbafa23..3accb1fc0d8 100644
--- a/packages/google-cloud-videointelligence/src/v1beta1/doc/google/protobuf/doc_any.js
+++ b/packages/google-cloud-videointelligence/src/v1beta1/doc/google/protobuf/doc_any.js
@@ -131,6 +131,6 @@
  * @memberof google.protobuf
  * @see [google.protobuf.Any definition in proto format]{@link https://github.com/google/protobuf/blob/master/src/google/protobuf/any.proto}
  */
-var Any = {
+const Any = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1beta1/doc/google/rpc/doc_status.js b/packages/google-cloud-videointelligence/src/v1beta1/doc/google/rpc/doc_status.js
index 7122f1682e0..13cfcab1021 100644
--- a/packages/google-cloud-videointelligence/src/v1beta1/doc/google/rpc/doc_status.js
+++ b/packages/google-cloud-videointelligence/src/v1beta1/doc/google/rpc/doc_status.js
@@ -87,6 +87,6 @@
  * @memberof google.rpc
  * @see [google.rpc.Status definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/rpc/status.proto}
  */
-var Status = {
+const Status = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1beta1/video_intelligence_service_client.js b/packages/google-cloud-videointelligence/src/v1beta1/video_intelligence_service_client.js
index f2b6447aefd..90327fc9706 100644
--- a/packages/google-cloud-videointelligence/src/v1beta1/video_intelligence_service_client.js
+++ b/packages/google-cloud-videointelligence/src/v1beta1/video_intelligence_service_client.js
@@ -72,13 +72,13 @@ class VideoIntelligenceServiceClient {
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
     opts.scopes = this.constructor.scopes;
-    var gaxGrpc = new gax.GrpcClient(opts);
+    const gaxGrpc = new gax.GrpcClient(opts);
 
     // Save the auth object to the client, for use by other methods.
     this.auth = gaxGrpc.auth;
 
     // Determine the client header string.
-    var clientHeader = [
+    const clientHeader = [
       `gl-node/${process.version}`,
       `grpc/${gaxGrpc.grpcVersion}`,
       `gax/${gax.version}`,
@@ -89,14 +89,14 @@ class VideoIntelligenceServiceClient {
     }
 
     // Load the applicable protos.
-    var protos = merge(
+    const protos = merge(
       {},
       gaxGrpc.loadProto(
         path.join(__dirname, '..', '..', 'protos'),
         'google/cloud/videointelligence/v1beta1/video_intelligence.proto'
       )
     );
-    var protoFilesRoot = new gax.GoogleProtoFilesRoot();
+    let protoFilesRoot = new gax.GoogleProtoFilesRoot();
     protoFilesRoot = protobuf.loadSync(
       path.join(
         __dirname,
@@ -116,10 +116,10 @@ class VideoIntelligenceServiceClient {
       grpc: gaxGrpc.grpc,
     }).operationsClient(opts);
 
-    var annotateVideoResponse = protoFilesRoot.lookup(
+    const annotateVideoResponse = protoFilesRoot.lookup(
       'google.cloud.videointelligence.v1beta1.AnnotateVideoResponse'
     );
-    var annotateVideoMetadata = protoFilesRoot.lookup(
+    const annotateVideoMetadata = protoFilesRoot.lookup(
       'google.cloud.videointelligence.v1beta1.AnnotateVideoProgress'
     );
 
@@ -132,7 +132,7 @@ class VideoIntelligenceServiceClient {
     };
 
     // Put together the default options sent with requests.
-    var defaults = gaxGrpc.constructSettings(
+    const defaults = gaxGrpc.constructSettings(
       'google.cloud.videointelligence.v1beta1.VideoIntelligenceService',
       gapicConfig,
       opts.clientConfig,
@@ -146,20 +146,20 @@ class VideoIntelligenceServiceClient {
 
     // Put together the "service stub" for
     // google.cloud.videointelligence.v1beta1.VideoIntelligenceService.
-    var videoIntelligenceServiceStub = gaxGrpc.createStub(
+    const videoIntelligenceServiceStub = gaxGrpc.createStub(
       protos.google.cloud.videointelligence.v1beta1.VideoIntelligenceService,
       opts
     );
 
     // Iterate over each of the methods that the service provides
     // and create an API call method for each.
-    var videoIntelligenceServiceStubMethods = ['annotateVideo'];
+    const videoIntelligenceServiceStubMethods = ['annotateVideo'];
     for (let methodName of videoIntelligenceServiceStubMethods) {
       this._innerApiCalls[methodName] = gax.createApiCall(
         videoIntelligenceServiceStub.then(
           stub =>
             function() {
-              var args = Array.prototype.slice.call(arguments, 0);
+              const args = Array.prototype.slice.call(arguments, 0);
               return stub[methodName].apply(stub, args);
             }
         ),
@@ -260,14 +260,14 @@ class VideoIntelligenceServiceClient {
    *
    * const videointelligence = require('@google-cloud/videointelligence');
    *
-   * var client = new videointelligence.v1beta1.VideoIntelligenceServiceClient({
+   * const client = new videointelligence.v1beta1.VideoIntelligenceServiceClient({
    *   // optional auth parameters.
    * });
    *
-   * var inputUri = 'gs://demomaker/cat.mp4';
-   * var featuresElement = 'LABEL_DETECTION';
-   * var features = [featuresElement];
-   * var request = {
+   * const inputUri = 'gs://demomaker/cat.mp4';
+   * const featuresElement = 'LABEL_DETECTION';
+   * const features = [featuresElement];
+   * const request = {
    *   inputUri: inputUri,
    *   features: features,
    * };
@@ -275,30 +275,30 @@ class VideoIntelligenceServiceClient {
    * // Handle the operation using the promise pattern.
    * client.annotateVideo(request)
    *   .then(responses => {
-   *     var operation = responses[0];
-   *     var initialApiResponse = responses[1];
+   *     const operation = responses[0];
+   *     const initialApiResponse = responses[1];
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
    *     // The final result of the operation.
-   *     var result = responses[0];
+   *     const result = responses[0];
    *
    *     // The metadata value of the completed operation.
-   *     var metadata = responses[1];
+   *     const metadata = responses[1];
    *
    *     // The response of the api call returning the complete operation.
-   *     var finalApiResponse = responses[2];
+   *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
    *     console.error(err);
    *   });
    *
-   * var inputUri = 'gs://demomaker/cat.mp4';
-   * var featuresElement = 'LABEL_DETECTION';
-   * var features = [featuresElement];
-   * var request = {
+   * const inputUri = 'gs://demomaker/cat.mp4';
+   * const featuresElement = 'LABEL_DETECTION';
+   * const features = [featuresElement];
+   * const request = {
    *   inputUri: inputUri,
    *   features: features,
    * };
@@ -306,8 +306,8 @@ class VideoIntelligenceServiceClient {
    * // Handle the operation using the event emitter pattern.
    * client.annotateVideo(request)
    *   .then(responses => {
-   *     var operation = responses[0];
-   *     var initialApiResponse = responses[1];
+   *     const operation = responses[0];
+   *     const initialApiResponse = responses[1];
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/cloud/videointelligence/v1beta2/doc_video_intelligence.js b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/cloud/videointelligence/v1beta2/doc_video_intelligence.js
index 0b6902adc13..cbb27216ab0 100644
--- a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/cloud/videointelligence/v1beta2/doc_video_intelligence.js
+++ b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/cloud/videointelligence/v1beta2/doc_video_intelligence.js
@@ -62,7 +62,7 @@
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.AnnotateVideoRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var AnnotateVideoRequest = {
+const AnnotateVideoRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -100,7 +100,7 @@ var AnnotateVideoRequest = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.VideoContext definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var VideoContext = {
+const VideoContext = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -128,7 +128,7 @@ var VideoContext = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.LabelDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var LabelDetectionConfig = {
+const LabelDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -144,7 +144,7 @@ var LabelDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.ShotChangeDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var ShotChangeDetectionConfig = {
+const ShotChangeDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -160,7 +160,7 @@ var ShotChangeDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.ExplicitContentDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var ExplicitContentDetectionConfig = {
+const ExplicitContentDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -179,7 +179,7 @@ var ExplicitContentDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.FaceDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var FaceDetectionConfig = {
+const FaceDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -202,7 +202,7 @@ var FaceDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.VideoSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var VideoSegment = {
+const VideoSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -221,7 +221,7 @@ var VideoSegment = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.LabelSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var LabelSegment = {
+const LabelSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -241,7 +241,7 @@ var LabelSegment = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.LabelFrame definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var LabelFrame = {
+const LabelFrame = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -263,7 +263,7 @@ var LabelFrame = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.Entity definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var Entity = {
+const Entity = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -297,7 +297,7 @@ var Entity = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.LabelAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var LabelAnnotation = {
+const LabelAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -319,7 +319,7 @@ var LabelAnnotation = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.ExplicitContentFrame definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var ExplicitContentFrame = {
+const ExplicitContentFrame = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -337,7 +337,7 @@ var ExplicitContentFrame = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.ExplicitContentAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var ExplicitContentAnnotation = {
+const ExplicitContentAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -362,7 +362,7 @@ var ExplicitContentAnnotation = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.NormalizedBoundingBox definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var NormalizedBoundingBox = {
+const NormalizedBoundingBox = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -378,7 +378,7 @@ var NormalizedBoundingBox = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.FaceSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var FaceSegment = {
+const FaceSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -402,7 +402,7 @@ var FaceSegment = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.FaceFrame definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var FaceFrame = {
+const FaceFrame = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -426,7 +426,7 @@ var FaceFrame = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.FaceAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var FaceAnnotation = {
+const FaceAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -480,7 +480,7 @@ var FaceAnnotation = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.VideoAnnotationResults definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var VideoAnnotationResults = {
+const VideoAnnotationResults = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -498,7 +498,7 @@ var VideoAnnotationResults = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.AnnotateVideoResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var AnnotateVideoResponse = {
+const AnnotateVideoResponse = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -527,7 +527,7 @@ var AnnotateVideoResponse = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.VideoAnnotationProgress definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var VideoAnnotationProgress = {
+const VideoAnnotationProgress = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -545,7 +545,7 @@ var VideoAnnotationProgress = {
  * @memberof google.cloud.videointelligence.v1beta2
  * @see [google.cloud.videointelligence.v1beta2.AnnotateVideoProgress definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1beta2/video_intelligence.proto}
  */
-var AnnotateVideoProgress = {
+const AnnotateVideoProgress = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -555,7 +555,7 @@ var AnnotateVideoProgress = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1beta2
  */
-var Feature = {
+const Feature = {
 
   /**
    * Unspecified.
@@ -589,7 +589,7 @@ var Feature = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1beta2
  */
-var LabelDetectionMode = {
+const LabelDetectionMode = {
 
   /**
    * Unspecified.
@@ -618,7 +618,7 @@ var LabelDetectionMode = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1beta2
  */
-var Likelihood = {
+const Likelihood = {
 
   /**
    * Unspecified likelihood.
diff --git a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/longrunning/doc_operations.js b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/longrunning/doc_operations.js
index 79ef6344437..4af5d7d3574 100644
--- a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/longrunning/doc_operations.js
+++ b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/longrunning/doc_operations.js
@@ -58,7 +58,7 @@
  * @memberof google.longrunning
  * @see [google.longrunning.Operation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var Operation = {
+const Operation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -72,7 +72,7 @@ var Operation = {
  * @memberof google.longrunning
  * @see [google.longrunning.GetOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var GetOperationRequest = {
+const GetOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -95,7 +95,7 @@ var GetOperationRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.ListOperationsRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var ListOperationsRequest = {
+const ListOperationsRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -114,7 +114,7 @@ var ListOperationsRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.ListOperationsResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var ListOperationsResponse = {
+const ListOperationsResponse = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -128,7 +128,7 @@ var ListOperationsResponse = {
  * @memberof google.longrunning
  * @see [google.longrunning.CancelOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var CancelOperationRequest = {
+const CancelOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -142,6 +142,6 @@ var CancelOperationRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.DeleteOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var DeleteOperationRequest = {
+const DeleteOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/protobuf/doc_any.js b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/protobuf/doc_any.js
index c5c5bbafa23..3accb1fc0d8 100644
--- a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/protobuf/doc_any.js
+++ b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/protobuf/doc_any.js
@@ -131,6 +131,6 @@
  * @memberof google.protobuf
  * @see [google.protobuf.Any definition in proto format]{@link https://github.com/google/protobuf/blob/master/src/google/protobuf/any.proto}
  */
-var Any = {
+const Any = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/protobuf/doc_duration.js b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/protobuf/doc_duration.js
index 3ea5c376abb..c03ce2fb3df 100644
--- a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/protobuf/doc_duration.js
+++ b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/protobuf/doc_duration.js
@@ -92,6 +92,6 @@
  * @memberof google.protobuf
  * @see [google.protobuf.Duration definition in proto format]{@link https://github.com/google/protobuf/blob/master/src/google/protobuf/duration.proto}
  */
-var Duration = {
+const Duration = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/rpc/doc_status.js b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/rpc/doc_status.js
index 7122f1682e0..13cfcab1021 100644
--- a/packages/google-cloud-videointelligence/src/v1beta2/doc/google/rpc/doc_status.js
+++ b/packages/google-cloud-videointelligence/src/v1beta2/doc/google/rpc/doc_status.js
@@ -87,6 +87,6 @@
  * @memberof google.rpc
  * @see [google.rpc.Status definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/rpc/status.proto}
  */
-var Status = {
+const Status = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1beta2/video_intelligence_service_client.js b/packages/google-cloud-videointelligence/src/v1beta2/video_intelligence_service_client.js
index 5aa1e3e90fd..6b73c09e508 100644
--- a/packages/google-cloud-videointelligence/src/v1beta2/video_intelligence_service_client.js
+++ b/packages/google-cloud-videointelligence/src/v1beta2/video_intelligence_service_client.js
@@ -72,13 +72,13 @@ class VideoIntelligenceServiceClient {
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
     opts.scopes = this.constructor.scopes;
-    var gaxGrpc = new gax.GrpcClient(opts);
+    const gaxGrpc = new gax.GrpcClient(opts);
 
     // Save the auth object to the client, for use by other methods.
     this.auth = gaxGrpc.auth;
 
     // Determine the client header string.
-    var clientHeader = [
+    const clientHeader = [
       `gl-node/${process.version}`,
       `grpc/${gaxGrpc.grpcVersion}`,
       `gax/${gax.version}`,
@@ -89,14 +89,14 @@ class VideoIntelligenceServiceClient {
     }
 
     // Load the applicable protos.
-    var protos = merge(
+    const protos = merge(
       {},
       gaxGrpc.loadProto(
         path.join(__dirname, '..', '..', 'protos'),
         'google/cloud/videointelligence/v1beta2/video_intelligence.proto'
       )
     );
-    var protoFilesRoot = new gax.GoogleProtoFilesRoot();
+    let protoFilesRoot = new gax.GoogleProtoFilesRoot();
     protoFilesRoot = protobuf.loadSync(
       path.join(
         __dirname,
@@ -116,10 +116,10 @@ class VideoIntelligenceServiceClient {
       grpc: gaxGrpc.grpc,
     }).operationsClient(opts);
 
-    var annotateVideoResponse = protoFilesRoot.lookup(
+    const annotateVideoResponse = protoFilesRoot.lookup(
       'google.cloud.videointelligence.v1beta2.AnnotateVideoResponse'
     );
-    var annotateVideoMetadata = protoFilesRoot.lookup(
+    const annotateVideoMetadata = protoFilesRoot.lookup(
       'google.cloud.videointelligence.v1beta2.AnnotateVideoProgress'
     );
 
@@ -132,7 +132,7 @@ class VideoIntelligenceServiceClient {
     };
 
     // Put together the default options sent with requests.
-    var defaults = gaxGrpc.constructSettings(
+    const defaults = gaxGrpc.constructSettings(
       'google.cloud.videointelligence.v1beta2.VideoIntelligenceService',
       gapicConfig,
       opts.clientConfig,
@@ -146,20 +146,20 @@ class VideoIntelligenceServiceClient {
 
     // Put together the "service stub" for
     // google.cloud.videointelligence.v1beta2.VideoIntelligenceService.
-    var videoIntelligenceServiceStub = gaxGrpc.createStub(
+    const videoIntelligenceServiceStub = gaxGrpc.createStub(
       protos.google.cloud.videointelligence.v1beta2.VideoIntelligenceService,
       opts
     );
 
     // Iterate over each of the methods that the service provides
     // and create an API call method for each.
-    var videoIntelligenceServiceStubMethods = ['annotateVideo'];
+    const videoIntelligenceServiceStubMethods = ['annotateVideo'];
     for (let methodName of videoIntelligenceServiceStubMethods) {
       this._innerApiCalls[methodName] = gax.createApiCall(
         videoIntelligenceServiceStub.then(
           stub =>
             function() {
-              var args = Array.prototype.slice.call(arguments, 0);
+              const args = Array.prototype.slice.call(arguments, 0);
               return stub[methodName].apply(stub, args);
             }
         ),
@@ -261,14 +261,14 @@ class VideoIntelligenceServiceClient {
    *
    * const videoIntelligence = require('@google-cloud/video-intelligence');
    *
-   * var client = new videoIntelligence.v1beta2.VideoIntelligenceServiceClient({
+   * const client = new videoIntelligence.v1beta2.VideoIntelligenceServiceClient({
    *   // optional auth parameters.
    * });
    *
-   * var inputUri = 'gs://demomaker/cat.mp4';
-   * var featuresElement = 'LABEL_DETECTION';
-   * var features = [featuresElement];
-   * var request = {
+   * const inputUri = 'gs://demomaker/cat.mp4';
+   * const featuresElement = 'LABEL_DETECTION';
+   * const features = [featuresElement];
+   * const request = {
    *   inputUri: inputUri,
    *   features: features,
    * };
@@ -276,30 +276,30 @@ class VideoIntelligenceServiceClient {
    * // Handle the operation using the promise pattern.
    * client.annotateVideo(request)
    *   .then(responses => {
-   *     var operation = responses[0];
-   *     var initialApiResponse = responses[1];
+   *     const operation = responses[0];
+   *     const initialApiResponse = responses[1];
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
    *     // The final result of the operation.
-   *     var result = responses[0];
+   *     const result = responses[0];
    *
    *     // The metadata value of the completed operation.
-   *     var metadata = responses[1];
+   *     const metadata = responses[1];
    *
    *     // The response of the api call returning the complete operation.
-   *     var finalApiResponse = responses[2];
+   *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
    *     console.error(err);
    *   });
    *
-   * var inputUri = 'gs://demomaker/cat.mp4';
-   * var featuresElement = 'LABEL_DETECTION';
-   * var features = [featuresElement];
-   * var request = {
+   * const inputUri = 'gs://demomaker/cat.mp4';
+   * const featuresElement = 'LABEL_DETECTION';
+   * const features = [featuresElement];
+   * const request = {
    *   inputUri: inputUri,
    *   features: features,
    * };
@@ -307,8 +307,8 @@ class VideoIntelligenceServiceClient {
    * // Handle the operation using the event emitter pattern.
    * client.annotateVideo(request)
    *   .then(responses => {
-   *     var operation = responses[0];
-   *     var initialApiResponse = responses[1];
+   *     const operation = responses[0];
+   *     const initialApiResponse = responses[1];
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/cloud/videointelligence/v1p1beta1/doc_video_intelligence.js b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/cloud/videointelligence/v1p1beta1/doc_video_intelligence.js
index bcd79fedc26..771b44aa26e 100644
--- a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/cloud/videointelligence/v1p1beta1/doc_video_intelligence.js
+++ b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/cloud/videointelligence/v1p1beta1/doc_video_intelligence.js
@@ -62,7 +62,7 @@
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.AnnotateVideoRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var AnnotateVideoRequest = {
+const AnnotateVideoRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -100,7 +100,7 @@ var AnnotateVideoRequest = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.VideoContext definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var VideoContext = {
+const VideoContext = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -128,7 +128,7 @@ var VideoContext = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.LabelDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var LabelDetectionConfig = {
+const LabelDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -144,7 +144,7 @@ var LabelDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.ShotChangeDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var ShotChangeDetectionConfig = {
+const ShotChangeDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -160,7 +160,7 @@ var ShotChangeDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.ExplicitContentDetectionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var ExplicitContentDetectionConfig = {
+const ExplicitContentDetectionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -183,7 +183,7 @@ var ExplicitContentDetectionConfig = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.VideoSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var VideoSegment = {
+const VideoSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -202,7 +202,7 @@ var VideoSegment = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.LabelSegment definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var LabelSegment = {
+const LabelSegment = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -222,7 +222,7 @@ var LabelSegment = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.LabelFrame definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var LabelFrame = {
+const LabelFrame = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -244,7 +244,7 @@ var LabelFrame = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.Entity definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var Entity = {
+const Entity = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -278,7 +278,7 @@ var Entity = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.LabelAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var LabelAnnotation = {
+const LabelAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -300,7 +300,7 @@ var LabelAnnotation = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.ExplicitContentFrame definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var ExplicitContentFrame = {
+const ExplicitContentFrame = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -318,7 +318,7 @@ var ExplicitContentFrame = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.ExplicitContentAnnotation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var ExplicitContentAnnotation = {
+const ExplicitContentAnnotation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -372,7 +372,7 @@ var ExplicitContentAnnotation = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.VideoAnnotationResults definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var VideoAnnotationResults = {
+const VideoAnnotationResults = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -390,7 +390,7 @@ var VideoAnnotationResults = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.AnnotateVideoResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var AnnotateVideoResponse = {
+const AnnotateVideoResponse = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -419,7 +419,7 @@ var AnnotateVideoResponse = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.VideoAnnotationProgress definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var VideoAnnotationProgress = {
+const VideoAnnotationProgress = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -437,7 +437,7 @@ var VideoAnnotationProgress = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.AnnotateVideoProgress definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var AnnotateVideoProgress = {
+const AnnotateVideoProgress = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -485,7 +485,7 @@ var AnnotateVideoProgress = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.SpeechTranscriptionConfig definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var SpeechTranscriptionConfig = {
+const SpeechTranscriptionConfig = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -505,7 +505,7 @@ var SpeechTranscriptionConfig = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.SpeechContext definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var SpeechContext = {
+const SpeechContext = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -524,7 +524,7 @@ var SpeechContext = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.SpeechTranscription definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var SpeechTranscription = {
+const SpeechTranscription = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -551,7 +551,7 @@ var SpeechTranscription = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.SpeechRecognitionAlternative definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var SpeechRecognitionAlternative = {
+const SpeechRecognitionAlternative = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -583,7 +583,7 @@ var SpeechRecognitionAlternative = {
  * @memberof google.cloud.videointelligence.v1p1beta1
  * @see [google.cloud.videointelligence.v1p1beta1.WordInfo definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/cloud/videointelligence/v1p1beta1/video_intelligence.proto}
  */
-var WordInfo = {
+const WordInfo = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -593,7 +593,7 @@ var WordInfo = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1p1beta1
  */
-var Feature = {
+const Feature = {
 
   /**
    * Unspecified.
@@ -627,7 +627,7 @@ var Feature = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1p1beta1
  */
-var LabelDetectionMode = {
+const LabelDetectionMode = {
 
   /**
    * Unspecified.
@@ -656,7 +656,7 @@ var LabelDetectionMode = {
  * @enum {number}
  * @memberof google.cloud.videointelligence.v1p1beta1
  */
-var Likelihood = {
+const Likelihood = {
 
   /**
    * Unspecified likelihood.
diff --git a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/longrunning/doc_operations.js b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/longrunning/doc_operations.js
index 79ef6344437..4af5d7d3574 100644
--- a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/longrunning/doc_operations.js
+++ b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/longrunning/doc_operations.js
@@ -58,7 +58,7 @@
  * @memberof google.longrunning
  * @see [google.longrunning.Operation definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var Operation = {
+const Operation = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -72,7 +72,7 @@ var Operation = {
  * @memberof google.longrunning
  * @see [google.longrunning.GetOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var GetOperationRequest = {
+const GetOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -95,7 +95,7 @@ var GetOperationRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.ListOperationsRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var ListOperationsRequest = {
+const ListOperationsRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -114,7 +114,7 @@ var ListOperationsRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.ListOperationsResponse definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var ListOperationsResponse = {
+const ListOperationsResponse = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -128,7 +128,7 @@ var ListOperationsResponse = {
  * @memberof google.longrunning
  * @see [google.longrunning.CancelOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var CancelOperationRequest = {
+const CancelOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
 
@@ -142,6 +142,6 @@ var CancelOperationRequest = {
  * @memberof google.longrunning
  * @see [google.longrunning.DeleteOperationRequest definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/longrunning/operations.proto}
  */
-var DeleteOperationRequest = {
+const DeleteOperationRequest = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/protobuf/doc_any.js b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/protobuf/doc_any.js
index c5c5bbafa23..3accb1fc0d8 100644
--- a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/protobuf/doc_any.js
+++ b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/protobuf/doc_any.js
@@ -131,6 +131,6 @@
  * @memberof google.protobuf
  * @see [google.protobuf.Any definition in proto format]{@link https://github.com/google/protobuf/blob/master/src/google/protobuf/any.proto}
  */
-var Any = {
+const Any = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/protobuf/doc_duration.js b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/protobuf/doc_duration.js
index 3ea5c376abb..c03ce2fb3df 100644
--- a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/protobuf/doc_duration.js
+++ b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/protobuf/doc_duration.js
@@ -92,6 +92,6 @@
  * @memberof google.protobuf
  * @see [google.protobuf.Duration definition in proto format]{@link https://github.com/google/protobuf/blob/master/src/google/protobuf/duration.proto}
  */
-var Duration = {
+const Duration = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/rpc/doc_status.js b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/rpc/doc_status.js
index 7122f1682e0..13cfcab1021 100644
--- a/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/rpc/doc_status.js
+++ b/packages/google-cloud-videointelligence/src/v1p1beta1/doc/google/rpc/doc_status.js
@@ -87,6 +87,6 @@
  * @memberof google.rpc
  * @see [google.rpc.Status definition in proto format]{@link https://github.com/googleapis/googleapis/blob/master/google/rpc/status.proto}
  */
-var Status = {
+const Status = {
   // This is for documentation. Actual contents will be loaded by gRPC.
 };
\ No newline at end of file
diff --git a/packages/google-cloud-videointelligence/src/v1p1beta1/video_intelligence_service_client.js b/packages/google-cloud-videointelligence/src/v1p1beta1/video_intelligence_service_client.js
index f53fdcdcdc4..81231d06fb6 100644
--- a/packages/google-cloud-videointelligence/src/v1p1beta1/video_intelligence_service_client.js
+++ b/packages/google-cloud-videointelligence/src/v1p1beta1/video_intelligence_service_client.js
@@ -72,13 +72,13 @@ class VideoIntelligenceServiceClient {
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
     opts.scopes = this.constructor.scopes;
-    var gaxGrpc = new gax.GrpcClient(opts);
+    const gaxGrpc = new gax.GrpcClient(opts);
 
     // Save the auth object to the client, for use by other methods.
     this.auth = gaxGrpc.auth;
 
     // Determine the client header string.
-    var clientHeader = [
+    const clientHeader = [
       `gl-node/${process.version}`,
       `grpc/${gaxGrpc.grpcVersion}`,
       `gax/${gax.version}`,
@@ -89,14 +89,14 @@ class VideoIntelligenceServiceClient {
     }
 
     // Load the applicable protos.
-    var protos = merge(
+    const protos = merge(
       {},
       gaxGrpc.loadProto(
         path.join(__dirname, '..', '..', 'protos'),
         'google/cloud/videointelligence/v1p1beta1/video_intelligence.proto'
       )
     );
-    var protoFilesRoot = new gax.GoogleProtoFilesRoot();
+    let protoFilesRoot = new gax.GoogleProtoFilesRoot();
     protoFilesRoot = protobuf.loadSync(
       path.join(
         __dirname,
@@ -116,10 +116,10 @@ class VideoIntelligenceServiceClient {
       grpc: gaxGrpc.grpc,
     }).operationsClient(opts);
 
-    var annotateVideoResponse = protoFilesRoot.lookup(
+    const annotateVideoResponse = protoFilesRoot.lookup(
       'google.cloud.videointelligence.v1p1beta1.AnnotateVideoResponse'
     );
-    var annotateVideoMetadata = protoFilesRoot.lookup(
+    const annotateVideoMetadata = protoFilesRoot.lookup(
       'google.cloud.videointelligence.v1p1beta1.AnnotateVideoProgress'
     );
 
@@ -132,7 +132,7 @@ class VideoIntelligenceServiceClient {
     };
 
     // Put together the default options sent with requests.
-    var defaults = gaxGrpc.constructSettings(
+    const defaults = gaxGrpc.constructSettings(
       'google.cloud.videointelligence.v1p1beta1.VideoIntelligenceService',
       gapicConfig,
       opts.clientConfig,
@@ -146,20 +146,20 @@ class VideoIntelligenceServiceClient {
 
     // Put together the "service stub" for
     // google.cloud.videointelligence.v1p1beta1.VideoIntelligenceService.
-    var videoIntelligenceServiceStub = gaxGrpc.createStub(
+    const videoIntelligenceServiceStub = gaxGrpc.createStub(
       protos.google.cloud.videointelligence.v1p1beta1.VideoIntelligenceService,
       opts
     );
 
     // Iterate over each of the methods that the service provides
     // and create an API call method for each.
-    var videoIntelligenceServiceStubMethods = ['annotateVideo'];
+    const videoIntelligenceServiceStubMethods = ['annotateVideo'];
     for (let methodName of videoIntelligenceServiceStubMethods) {
       this._innerApiCalls[methodName] = gax.createApiCall(
         videoIntelligenceServiceStub.then(
           stub =>
             function() {
-              var args = Array.prototype.slice.call(arguments, 0);
+              const args = Array.prototype.slice.call(arguments, 0);
               return stub[methodName].apply(stub, args);
             }
         ),
@@ -261,14 +261,14 @@ class VideoIntelligenceServiceClient {
    *
    * const videoIntelligence = require('@google-cloud/video-intelligence');
    *
-   * var client = new videoIntelligence.v1p1beta1.VideoIntelligenceServiceClient({
+   * const client = new videoIntelligence.v1p1beta1.VideoIntelligenceServiceClient({
    *   // optional auth parameters.
    * });
    *
-   * var inputUri = 'gs://demomaker/cat.mp4';
-   * var featuresElement = 'LABEL_DETECTION';
-   * var features = [featuresElement];
-   * var request = {
+   * const inputUri = 'gs://demomaker/cat.mp4';
+   * const featuresElement = 'LABEL_DETECTION';
+   * const features = [featuresElement];
+   * const request = {
    *   inputUri: inputUri,
    *   features: features,
    * };
@@ -276,30 +276,30 @@ class VideoIntelligenceServiceClient {
    * // Handle the operation using the promise pattern.
    * client.annotateVideo(request)
    *   .then(responses => {
-   *     var operation = responses[0];
-   *     var initialApiResponse = responses[1];
+   *     const operation = responses[0];
+   *     const initialApiResponse = responses[1];
    *
    *     // Operation#promise starts polling for the completion of the LRO.
    *     return operation.promise();
    *   })
    *   .then(responses => {
    *     // The final result of the operation.
-   *     var result = responses[0];
+   *     const result = responses[0];
    *
    *     // The metadata value of the completed operation.
-   *     var metadata = responses[1];
+   *     const metadata = responses[1];
    *
    *     // The response of the api call returning the complete operation.
-   *     var finalApiResponse = responses[2];
+   *     const finalApiResponse = responses[2];
    *   })
    *   .catch(err => {
    *     console.error(err);
    *   });
    *
-   * var inputUri = 'gs://demomaker/cat.mp4';
-   * var featuresElement = 'LABEL_DETECTION';
-   * var features = [featuresElement];
-   * var request = {
+   * const inputUri = 'gs://demomaker/cat.mp4';
+   * const featuresElement = 'LABEL_DETECTION';
+   * const features = [featuresElement];
+   * const request = {
    *   inputUri: inputUri,
    *   features: features,
    * };
@@ -307,8 +307,8 @@ class VideoIntelligenceServiceClient {
    * // Handle the operation using the event emitter pattern.
    * client.annotateVideo(request)
    *   .then(responses => {
-   *     var operation = responses[0];
-   *     var initialApiResponse = responses[1];
+   *     const operation = responses[0];
+   *     const initialApiResponse = responses[1];
    *
    *     // Adding a listener for the "complete" event starts polling for the
    *     // completion of the operation.
diff --git a/packages/google-cloud-videointelligence/test/gapic-v1.js b/packages/google-cloud-videointelligence/test/gapic-v1.js
index 2b44f38b13e..98e1478a85e 100644
--- a/packages/google-cloud-videointelligence/test/gapic-v1.js
+++ b/packages/google-cloud-videointelligence/test/gapic-v1.js
@@ -18,14 +18,14 @@ const assert = require('assert');
 
 const videoIntelligenceModule = require('../src');
 
-var FAKE_STATUS_CODE = 1;
-var error = new Error();
+const FAKE_STATUS_CODE = 1;
+const error = new Error();
 error.code = FAKE_STATUS_CODE;
 
 describe('VideoIntelligenceServiceClient', () => {
   describe('annotateVideo', function() {
     it('invokes annotateVideo without error', done => {
-      var client = new videoIntelligenceModule.v1.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -33,16 +33,16 @@ describe('VideoIntelligenceServiceClient', () => {
       );
 
       // Mock request
-      var inputUri = 'gs://demomaker/cat.mp4';
-      var featuresElement = 'LABEL_DETECTION';
-      var features = [featuresElement];
-      var request = {
+      const inputUri = 'gs://demomaker/cat.mp4';
+      const featuresElement = 'LABEL_DETECTION';
+      const features = [featuresElement];
+      const request = {
         inputUri: inputUri,
         features: features,
       };
 
       // Mock response
-      var expectedResponse = {};
+      const expectedResponse = {};
 
       // Mock Grpc layer
       client._innerApiCalls.annotateVideo = mockLongRunningGrpcMethod(
@@ -53,7 +53,7 @@ describe('VideoIntelligenceServiceClient', () => {
       client
         .annotateVideo(request)
         .then(responses => {
-          var operation = responses[0];
+          const operation = responses[0];
           return operation.promise();
         })
         .then(responses => {
@@ -66,7 +66,7 @@ describe('VideoIntelligenceServiceClient', () => {
     });
 
     it('invokes annotateVideo with error', done => {
-      var client = new videoIntelligenceModule.v1.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -74,10 +74,10 @@ describe('VideoIntelligenceServiceClient', () => {
       );
 
       // Mock request
-      var inputUri = 'gs://demomaker/cat.mp4';
-      var featuresElement = 'LABEL_DETECTION';
-      var features = [featuresElement];
-      var request = {
+      const inputUri = 'gs://demomaker/cat.mp4';
+      const featuresElement = 'LABEL_DETECTION';
+      const features = [featuresElement];
+      const request = {
         inputUri: inputUri,
         features: features,
       };
@@ -92,7 +92,7 @@ describe('VideoIntelligenceServiceClient', () => {
       client
         .annotateVideo(request)
         .then(responses => {
-          var operation = responses[0];
+          const operation = responses[0];
           return operation.promise();
         })
         .then(() => {
@@ -106,7 +106,7 @@ describe('VideoIntelligenceServiceClient', () => {
     });
 
     it('has longrunning decoder functions', () => {
-      var client = new videoIntelligenceModule.v1.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -127,7 +127,7 @@ describe('VideoIntelligenceServiceClient', () => {
 function mockLongRunningGrpcMethod(expectedRequest, response, error) {
   return request => {
     assert.deepStrictEqual(request, expectedRequest);
-    var mockOperation = {
+    const mockOperation = {
       promise: function() {
         return new Promise((resolve, reject) => {
           if (error) {
diff --git a/packages/google-cloud-videointelligence/test/gapic-v1beta1.js b/packages/google-cloud-videointelligence/test/gapic-v1beta1.js
index e19c91d2dfa..beb3ce95dec 100644
--- a/packages/google-cloud-videointelligence/test/gapic-v1beta1.js
+++ b/packages/google-cloud-videointelligence/test/gapic-v1beta1.js
@@ -18,14 +18,14 @@ const assert = require('assert');
 
 const videointelligenceModule = require('../src');
 
-var FAKE_STATUS_CODE = 1;
-var error = new Error();
+const FAKE_STATUS_CODE = 1;
+const error = new Error();
 error.code = FAKE_STATUS_CODE;
 
 describe('VideoIntelligenceServiceClient', () => {
   describe('annotateVideo', function() {
     it('invokes annotateVideo without error', done => {
-      var client = new videointelligenceModule.v1beta1.VideoIntelligenceServiceClient(
+      const client = new videointelligenceModule.v1beta1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -33,16 +33,16 @@ describe('VideoIntelligenceServiceClient', () => {
       );
 
       // Mock request
-      var inputUri = 'gs://demomaker/cat.mp4';
-      var featuresElement = 'LABEL_DETECTION';
-      var features = [featuresElement];
-      var request = {
+      const inputUri = 'gs://demomaker/cat.mp4';
+      const featuresElement = 'LABEL_DETECTION';
+      const features = [featuresElement];
+      const request = {
         inputUri: inputUri,
         features: features,
       };
 
       // Mock response
-      var expectedResponse = {};
+      const expectedResponse = {};
 
       // Mock Grpc layer
       client._innerApiCalls.annotateVideo = mockLongRunningGrpcMethod(
@@ -53,7 +53,7 @@ describe('VideoIntelligenceServiceClient', () => {
       client
         .annotateVideo(request)
         .then(responses => {
-          var operation = responses[0];
+          const operation = responses[0];
           return operation.promise();
         })
         .then(responses => {
@@ -66,7 +66,7 @@ describe('VideoIntelligenceServiceClient', () => {
     });
 
     it('invokes annotateVideo with error', done => {
-      var client = new videointelligenceModule.v1beta1.VideoIntelligenceServiceClient(
+      const client = new videointelligenceModule.v1beta1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -74,10 +74,10 @@ describe('VideoIntelligenceServiceClient', () => {
       );
 
       // Mock request
-      var inputUri = 'gs://demomaker/cat.mp4';
-      var featuresElement = 'LABEL_DETECTION';
-      var features = [featuresElement];
-      var request = {
+      const inputUri = 'gs://demomaker/cat.mp4';
+      const featuresElement = 'LABEL_DETECTION';
+      const features = [featuresElement];
+      const request = {
         inputUri: inputUri,
         features: features,
       };
@@ -92,7 +92,7 @@ describe('VideoIntelligenceServiceClient', () => {
       client
         .annotateVideo(request)
         .then(responses => {
-          var operation = responses[0];
+          const operation = responses[0];
           return operation.promise();
         })
         .then(() => {
@@ -106,7 +106,7 @@ describe('VideoIntelligenceServiceClient', () => {
     });
 
     it('has longrunning decoder functions', () => {
-      var client = new videointelligenceModule.v1beta1.VideoIntelligenceServiceClient(
+      const client = new videointelligenceModule.v1beta1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -127,7 +127,7 @@ describe('VideoIntelligenceServiceClient', () => {
 function mockLongRunningGrpcMethod(expectedRequest, response, error) {
   return request => {
     assert.deepStrictEqual(request, expectedRequest);
-    var mockOperation = {
+    const mockOperation = {
       promise: function() {
         return new Promise((resolve, reject) => {
           if (error) {
diff --git a/packages/google-cloud-videointelligence/test/gapic-v1beta2.js b/packages/google-cloud-videointelligence/test/gapic-v1beta2.js
index b95d496fdbc..befa16c4c00 100644
--- a/packages/google-cloud-videointelligence/test/gapic-v1beta2.js
+++ b/packages/google-cloud-videointelligence/test/gapic-v1beta2.js
@@ -18,14 +18,14 @@ const assert = require('assert');
 
 const videoIntelligenceModule = require('../src');
 
-var FAKE_STATUS_CODE = 1;
-var error = new Error();
+const FAKE_STATUS_CODE = 1;
+const error = new Error();
 error.code = FAKE_STATUS_CODE;
 
 describe('VideoIntelligenceServiceClient', () => {
   describe('annotateVideo', function() {
     it('invokes annotateVideo without error', done => {
-      var client = new videoIntelligenceModule.v1beta2.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1beta2.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -33,16 +33,16 @@ describe('VideoIntelligenceServiceClient', () => {
       );
 
       // Mock request
-      var inputUri = 'gs://demomaker/cat.mp4';
-      var featuresElement = 'LABEL_DETECTION';
-      var features = [featuresElement];
-      var request = {
+      const inputUri = 'gs://demomaker/cat.mp4';
+      const featuresElement = 'LABEL_DETECTION';
+      const features = [featuresElement];
+      const request = {
         inputUri: inputUri,
         features: features,
       };
 
       // Mock response
-      var expectedResponse = {};
+      const expectedResponse = {};
 
       // Mock Grpc layer
       client._innerApiCalls.annotateVideo = mockLongRunningGrpcMethod(
@@ -53,7 +53,7 @@ describe('VideoIntelligenceServiceClient', () => {
       client
         .annotateVideo(request)
         .then(responses => {
-          var operation = responses[0];
+          const operation = responses[0];
           return operation.promise();
         })
         .then(responses => {
@@ -66,7 +66,7 @@ describe('VideoIntelligenceServiceClient', () => {
     });
 
     it('invokes annotateVideo with error', done => {
-      var client = new videoIntelligenceModule.v1beta2.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1beta2.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -74,10 +74,10 @@ describe('VideoIntelligenceServiceClient', () => {
       );
 
       // Mock request
-      var inputUri = 'gs://demomaker/cat.mp4';
-      var featuresElement = 'LABEL_DETECTION';
-      var features = [featuresElement];
-      var request = {
+      const inputUri = 'gs://demomaker/cat.mp4';
+      const featuresElement = 'LABEL_DETECTION';
+      const features = [featuresElement];
+      const request = {
         inputUri: inputUri,
         features: features,
       };
@@ -92,7 +92,7 @@ describe('VideoIntelligenceServiceClient', () => {
       client
         .annotateVideo(request)
         .then(responses => {
-          var operation = responses[0];
+          const operation = responses[0];
           return operation.promise();
         })
         .then(() => {
@@ -106,7 +106,7 @@ describe('VideoIntelligenceServiceClient', () => {
     });
 
     it('has longrunning decoder functions', () => {
-      var client = new videoIntelligenceModule.v1beta2.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1beta2.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -127,7 +127,7 @@ describe('VideoIntelligenceServiceClient', () => {
 function mockLongRunningGrpcMethod(expectedRequest, response, error) {
   return request => {
     assert.deepStrictEqual(request, expectedRequest);
-    var mockOperation = {
+    const mockOperation = {
       promise: function() {
         return new Promise((resolve, reject) => {
           if (error) {
diff --git a/packages/google-cloud-videointelligence/test/gapic-v1p1beta1.js b/packages/google-cloud-videointelligence/test/gapic-v1p1beta1.js
index bdb48809016..c9e7ac6cc78 100644
--- a/packages/google-cloud-videointelligence/test/gapic-v1p1beta1.js
+++ b/packages/google-cloud-videointelligence/test/gapic-v1p1beta1.js
@@ -18,14 +18,14 @@ const assert = require('assert');
 
 const videoIntelligenceModule = require('../src');
 
-var FAKE_STATUS_CODE = 1;
-var error = new Error();
+const FAKE_STATUS_CODE = 1;
+const error = new Error();
 error.code = FAKE_STATUS_CODE;
 
 describe('VideoIntelligenceServiceClient', () => {
   describe('annotateVideo', function() {
     it('invokes annotateVideo without error', done => {
-      var client = new videoIntelligenceModule.v1p1beta1.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1p1beta1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -33,16 +33,16 @@ describe('VideoIntelligenceServiceClient', () => {
       );
 
       // Mock request
-      var inputUri = 'gs://demomaker/cat.mp4';
-      var featuresElement = 'LABEL_DETECTION';
-      var features = [featuresElement];
-      var request = {
+      const inputUri = 'gs://demomaker/cat.mp4';
+      const featuresElement = 'LABEL_DETECTION';
+      const features = [featuresElement];
+      const request = {
         inputUri: inputUri,
         features: features,
       };
 
       // Mock response
-      var expectedResponse = {};
+      const expectedResponse = {};
 
       // Mock Grpc layer
       client._innerApiCalls.annotateVideo = mockLongRunningGrpcMethod(
@@ -53,7 +53,7 @@ describe('VideoIntelligenceServiceClient', () => {
       client
         .annotateVideo(request)
         .then(responses => {
-          var operation = responses[0];
+          const operation = responses[0];
           return operation.promise();
         })
         .then(responses => {
@@ -66,7 +66,7 @@ describe('VideoIntelligenceServiceClient', () => {
     });
 
     it('invokes annotateVideo with error', done => {
-      var client = new videoIntelligenceModule.v1p1beta1.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1p1beta1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -74,10 +74,10 @@ describe('VideoIntelligenceServiceClient', () => {
       );
 
       // Mock request
-      var inputUri = 'gs://demomaker/cat.mp4';
-      var featuresElement = 'LABEL_DETECTION';
-      var features = [featuresElement];
-      var request = {
+      const inputUri = 'gs://demomaker/cat.mp4';
+      const featuresElement = 'LABEL_DETECTION';
+      const features = [featuresElement];
+      const request = {
         inputUri: inputUri,
         features: features,
       };
@@ -92,7 +92,7 @@ describe('VideoIntelligenceServiceClient', () => {
       client
         .annotateVideo(request)
         .then(responses => {
-          var operation = responses[0];
+          const operation = responses[0];
           return operation.promise();
         })
         .then(() => {
@@ -106,7 +106,7 @@ describe('VideoIntelligenceServiceClient', () => {
     });
 
     it('has longrunning decoder functions', () => {
-      var client = new videoIntelligenceModule.v1p1beta1.VideoIntelligenceServiceClient(
+      const client = new videoIntelligenceModule.v1p1beta1.VideoIntelligenceServiceClient(
         {
           credentials: {client_email: 'bogus', private_key: 'bogus'},
           projectId: 'bogus',
@@ -127,7 +127,7 @@ describe('VideoIntelligenceServiceClient', () => {
 function mockLongRunningGrpcMethod(expectedRequest, response, error) {
   return request => {
     assert.deepStrictEqual(request, expectedRequest);
-    var mockOperation = {
+    const mockOperation = {
       promise: function() {
         return new Promise((resolve, reject) => {
           if (error) {