diff --git a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/AgentsClient.java b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/AgentsClient.java
index a56877e47544..86078ed10397 100644
--- a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/AgentsClient.java
+++ b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/AgentsClient.java
@@ -452,7 +452,7 @@ public final UnaryCallable<SearchAgentsRequest, SearchAgentsResponse> searchAgen
    * <pre><code>
    * try (AgentsClient agentsClient = AgentsClient.create()) {
    *   ProjectName parent = ProjectName.of("[PROJECT]");
-   *   Empty response = agentsClient.trainAgentAsync(parent).get();
+   *   agentsClient.trainAgentAsync(parent).get();
    * }
    * </code></pre>
    *
@@ -481,7 +481,7 @@ public final OperationFuture<Empty, Struct> trainAgentAsync(ProjectName parent)
    * <pre><code>
    * try (AgentsClient agentsClient = AgentsClient.create()) {
    *   ProjectName parent = ProjectName.of("[PROJECT]");
-   *   Empty response = agentsClient.trainAgentAsync(parent.toString()).get();
+   *   agentsClient.trainAgentAsync(parent.toString()).get();
    * }
    * </code></pre>
    *
@@ -512,7 +512,7 @@ public final OperationFuture<Empty, Struct> trainAgentAsync(String parent) {
    *   TrainAgentRequest request = TrainAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   Empty response = agentsClient.trainAgentAsync(request).get();
+   *   agentsClient.trainAgentAsync(request).get();
    * }
    * </code></pre>
    *
@@ -540,9 +540,9 @@ public final OperationFuture<Empty, Struct> trainAgentAsync(TrainAgentRequest re
    *   TrainAgentRequest request = TrainAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = agentsClient.trainAgentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = agentsClient.trainAgentOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -683,7 +683,7 @@ public final OperationFuture<ExportAgentResponse, Struct> exportAgentAsync(
    *   ExportAgentRequest request = ExportAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = agentsClient.exportAgentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;ExportAgentResponse, Struct&gt; future = agentsClient.exportAgentOperationCallable().futureCall(request);
    *   // Do something
    *   ExportAgentResponse response = future.get();
    * }
@@ -739,7 +739,7 @@ public final UnaryCallable<ExportAgentRequest, Operation> exportAgentCallable()
    *   ImportAgentRequest request = ImportAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   Empty response = agentsClient.importAgentAsync(request).get();
+   *   agentsClient.importAgentAsync(request).get();
    * }
    * </code></pre>
    *
@@ -770,9 +770,9 @@ public final OperationFuture<Empty, Struct> importAgentAsync(ImportAgentRequest
    *   ImportAgentRequest request = ImportAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = agentsClient.importAgentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = agentsClient.importAgentOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -827,7 +827,7 @@ public final UnaryCallable<ImportAgentRequest, Operation> importAgentCallable()
    *   RestoreAgentRequest request = RestoreAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   Empty response = agentsClient.restoreAgentAsync(request).get();
+   *   agentsClient.restoreAgentAsync(request).get();
    * }
    * </code></pre>
    *
@@ -858,9 +858,9 @@ public final OperationFuture<Empty, Struct> restoreAgentAsync(RestoreAgentReques
    *   RestoreAgentRequest request = RestoreAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = agentsClient.restoreAgentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = agentsClient.restoreAgentOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
diff --git a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/EntityTypesClient.java b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/EntityTypesClient.java
index 2ce9d286272d..3f56b68bd5dc 100644
--- a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/EntityTypesClient.java
+++ b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/EntityTypesClient.java
@@ -959,7 +959,7 @@ public final OperationFuture<BatchUpdateEntityTypesResponse, Struct> batchUpdate
    *   BatchUpdateEntityTypesRequest request = BatchUpdateEntityTypesRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchUpdateEntityTypesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;BatchUpdateEntityTypesResponse, Struct&gt; future = entityTypesClient.batchUpdateEntityTypesOperationCallable().futureCall(request);
    *   // Do something
    *   BatchUpdateEntityTypesResponse response = future.get();
    * }
@@ -1012,7 +1012,7 @@ public final OperationFuture<BatchUpdateEntityTypesResponse, Struct> batchUpdate
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   ProjectAgentName parent = ProjectAgentName.of("[PROJECT]");
    *   List&lt;String&gt; entityTypeNames = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchDeleteEntityTypesAsync(parent, entityTypeNames).get();
+   *   entityTypesClient.batchDeleteEntityTypesAsync(parent, entityTypeNames).get();
    * }
    * </code></pre>
    *
@@ -1048,7 +1048,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntityTypesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   ProjectAgentName parent = ProjectAgentName.of("[PROJECT]");
    *   List&lt;String&gt; entityTypeNames = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchDeleteEntityTypesAsync(parent.toString(), entityTypeNames).get();
+   *   entityTypesClient.batchDeleteEntityTypesAsync(parent.toString(), entityTypeNames).get();
    * }
    * </code></pre>
    *
@@ -1088,7 +1088,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntityTypesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntityTypeNames(entityTypeNames)
    *     .build();
-   *   Empty response = entityTypesClient.batchDeleteEntityTypesAsync(request).get();
+   *   entityTypesClient.batchDeleteEntityTypesAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1119,9 +1119,9 @@ public final OperationFuture<Empty, Struct> batchDeleteEntityTypesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntityTypeNames(entityTypeNames)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchDeleteEntityTypesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = entityTypesClient.batchDeleteEntityTypesOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -1172,7 +1172,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntityTypesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(parent, entities).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(parent, entities).get();
    * }
    * </code></pre>
    *
@@ -1207,7 +1207,7 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(parent.toString(), entities).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(parent.toString(), entities).get();
    * }
    * </code></pre>
    *
@@ -1240,7 +1240,7 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(parent, entities, languageCode).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(parent, entities, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1281,7 +1281,7 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(parent.toString(), entities, languageCode).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(parent.toString(), entities, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1325,7 +1325,7 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntities(entities)
    *     .build();
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(request).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1356,9 +1356,9 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntities(entities)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchCreateEntitiesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = entityTypesClient.batchCreateEntitiesOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -1408,7 +1408,7 @@ public final UnaryCallable<BatchCreateEntitiesRequest, Operation> batchCreateEnt
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(parent, entities).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(parent, entities).get();
    * }
    * </code></pre>
    *
@@ -1443,7 +1443,7 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(parent.toString(), entities).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(parent.toString(), entities).get();
    * }
    * </code></pre>
    *
@@ -1476,7 +1476,7 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(parent, entities, languageCode).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(parent, entities, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1517,7 +1517,7 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(parent.toString(), entities, languageCode).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(parent.toString(), entities, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1561,7 +1561,7 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntities(entities)
    *     .build();
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(request).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1592,9 +1592,9 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntities(entities)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchUpdateEntitiesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = entityTypesClient.batchUpdateEntitiesOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -1644,7 +1644,7 @@ public final UnaryCallable<BatchUpdateEntitiesRequest, Operation> batchUpdateEnt
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;String&gt; entityValues = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(parent, entityValues).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(parent, entityValues).get();
    * }
    * </code></pre>
    *
@@ -1680,7 +1680,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;String&gt; entityValues = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(parent.toString(), entityValues).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(parent.toString(), entityValues).get();
    * }
    * </code></pre>
    *
@@ -1717,7 +1717,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;String&gt; entityValues = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(parent, entityValues, languageCode).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(parent, entityValues, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1759,7 +1759,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;String&gt; entityValues = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(parent.toString(), entityValues, languageCode).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(parent.toString(), entityValues, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1804,7 +1804,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntityValues(entityValues)
    *     .build();
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(request).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1835,9 +1835,9 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntityValues(entityValues)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchDeleteEntitiesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = entityTypesClient.batchDeleteEntitiesOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
diff --git a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/IntentsClient.java b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/IntentsClient.java
index dd9b3589b95a..2a8b9095b7b1 100644
--- a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/IntentsClient.java
+++ b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2/IntentsClient.java
@@ -971,7 +971,7 @@ public final OperationFuture<BatchUpdateIntentsResponse, Struct> batchUpdateInte
    *     .setParent(parent.toString())
    *     .setLanguageCode(languageCode)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = intentsClient.batchUpdateIntentsOperationCallable().futureCall(request);
+   *   OperationFuture&lt;BatchUpdateIntentsResponse, Struct&gt; future = intentsClient.batchUpdateIntentsOperationCallable().futureCall(request);
    *   // Do something
    *   BatchUpdateIntentsResponse response = future.get();
    * }
@@ -1022,7 +1022,7 @@ public final UnaryCallable<BatchUpdateIntentsRequest, Operation> batchUpdateInte
    * try (IntentsClient intentsClient = IntentsClient.create()) {
    *   ProjectAgentName parent = ProjectAgentName.of("[PROJECT]");
    *   List&lt;Intent&gt; intents = new ArrayList&lt;&gt;();
-   *   Empty response = intentsClient.batchDeleteIntentsAsync(parent, intents).get();
+   *   intentsClient.batchDeleteIntentsAsync(parent, intents).get();
    * }
    * </code></pre>
    *
@@ -1057,7 +1057,7 @@ public final OperationFuture<Empty, Struct> batchDeleteIntentsAsync(
    * try (IntentsClient intentsClient = IntentsClient.create()) {
    *   ProjectAgentName parent = ProjectAgentName.of("[PROJECT]");
    *   List&lt;Intent&gt; intents = new ArrayList&lt;&gt;();
-   *   Empty response = intentsClient.batchDeleteIntentsAsync(parent.toString(), intents).get();
+   *   intentsClient.batchDeleteIntentsAsync(parent.toString(), intents).get();
    * }
    * </code></pre>
    *
@@ -1093,7 +1093,7 @@ public final OperationFuture<Empty, Struct> batchDeleteIntentsAsync(
    *     .setParent(parent.toString())
    *     .addAllIntents(intents)
    *     .build();
-   *   Empty response = intentsClient.batchDeleteIntentsAsync(request).get();
+   *   intentsClient.batchDeleteIntentsAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1123,9 +1123,9 @@ public final OperationFuture<Empty, Struct> batchDeleteIntentsAsync(
    *     .setParent(parent.toString())
    *     .addAllIntents(intents)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = intentsClient.batchDeleteIntentsOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = intentsClient.batchDeleteIntentsOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
diff --git a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/AgentsClient.java b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/AgentsClient.java
index 39034a5ffaf8..3a605f5f5cf0 100644
--- a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/AgentsClient.java
+++ b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/AgentsClient.java
@@ -453,7 +453,7 @@ public final UnaryCallable<SearchAgentsRequest, SearchAgentsResponse> searchAgen
    * <pre><code>
    * try (AgentsClient agentsClient = AgentsClient.create()) {
    *   ProjectName parent = ProjectName.of("[PROJECT]");
-   *   Empty response = agentsClient.trainAgentAsync(parent).get();
+   *   agentsClient.trainAgentAsync(parent).get();
    * }
    * </code></pre>
    *
@@ -482,7 +482,7 @@ public final OperationFuture<Empty, Struct> trainAgentAsync(ProjectName parent)
    * <pre><code>
    * try (AgentsClient agentsClient = AgentsClient.create()) {
    *   ProjectName parent = ProjectName.of("[PROJECT]");
-   *   Empty response = agentsClient.trainAgentAsync(parent.toString()).get();
+   *   agentsClient.trainAgentAsync(parent.toString()).get();
    * }
    * </code></pre>
    *
@@ -513,7 +513,7 @@ public final OperationFuture<Empty, Struct> trainAgentAsync(String parent) {
    *   TrainAgentRequest request = TrainAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   Empty response = agentsClient.trainAgentAsync(request).get();
+   *   agentsClient.trainAgentAsync(request).get();
    * }
    * </code></pre>
    *
@@ -541,9 +541,9 @@ public final OperationFuture<Empty, Struct> trainAgentAsync(TrainAgentRequest re
    *   TrainAgentRequest request = TrainAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = agentsClient.trainAgentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = agentsClient.trainAgentOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -684,7 +684,7 @@ public final OperationFuture<ExportAgentResponse, Struct> exportAgentAsync(
    *   ExportAgentRequest request = ExportAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = agentsClient.exportAgentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;ExportAgentResponse, Struct&gt; future = agentsClient.exportAgentOperationCallable().futureCall(request);
    *   // Do something
    *   ExportAgentResponse response = future.get();
    * }
@@ -740,7 +740,7 @@ public final UnaryCallable<ExportAgentRequest, Operation> exportAgentCallable()
    *   ImportAgentRequest request = ImportAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   Empty response = agentsClient.importAgentAsync(request).get();
+   *   agentsClient.importAgentAsync(request).get();
    * }
    * </code></pre>
    *
@@ -771,9 +771,9 @@ public final OperationFuture<Empty, Struct> importAgentAsync(ImportAgentRequest
    *   ImportAgentRequest request = ImportAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = agentsClient.importAgentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = agentsClient.importAgentOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -828,7 +828,7 @@ public final UnaryCallable<ImportAgentRequest, Operation> importAgentCallable()
    *   RestoreAgentRequest request = RestoreAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   Empty response = agentsClient.restoreAgentAsync(request).get();
+   *   agentsClient.restoreAgentAsync(request).get();
    * }
    * </code></pre>
    *
@@ -859,9 +859,9 @@ public final OperationFuture<Empty, Struct> restoreAgentAsync(RestoreAgentReques
    *   RestoreAgentRequest request = RestoreAgentRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = agentsClient.restoreAgentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = agentsClient.restoreAgentOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
diff --git a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/DocumentsClient.java b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/DocumentsClient.java
index 4ea829873915..ba2638bb9e9b 100644
--- a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/DocumentsClient.java
+++ b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/DocumentsClient.java
@@ -507,7 +507,7 @@ public final OperationFuture<Document, KnowledgeOperationMetadata> createDocumen
    *     .setParent(parent.toString())
    *     .setDocument(document)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = documentsClient.createDocumentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Document, KnowledgeOperationMetadata&gt; future = documentsClient.createDocumentOperationCallable().futureCall(request);
    *   // Do something
    *   Document response = future.get();
    * }
@@ -558,7 +558,7 @@ public final UnaryCallable<CreateDocumentRequest, Operation> createDocumentCalla
    * <pre><code>
    * try (DocumentsClient documentsClient = DocumentsClient.create()) {
    *   DocumentName name = DocumentName.of("[PROJECT]", "[KNOWLEDGE_BASE]", "[DOCUMENT]");
-   *   Empty response = documentsClient.deleteDocumentAsync(name).get();
+   *   documentsClient.deleteDocumentAsync(name).get();
    * }
    * </code></pre>
    *
@@ -588,7 +588,7 @@ public final OperationFuture<Empty, KnowledgeOperationMetadata> deleteDocumentAs
    * <pre><code>
    * try (DocumentsClient documentsClient = DocumentsClient.create()) {
    *   DocumentName name = DocumentName.of("[PROJECT]", "[KNOWLEDGE_BASE]", "[DOCUMENT]");
-   *   Empty response = documentsClient.deleteDocumentAsync(name.toString()).get();
+   *   documentsClient.deleteDocumentAsync(name.toString()).get();
    * }
    * </code></pre>
    *
@@ -619,7 +619,7 @@ public final OperationFuture<Empty, KnowledgeOperationMetadata> deleteDocumentAs
    *   DeleteDocumentRequest request = DeleteDocumentRequest.newBuilder()
    *     .setName(name.toString())
    *     .build();
-   *   Empty response = documentsClient.deleteDocumentAsync(request).get();
+   *   documentsClient.deleteDocumentAsync(request).get();
    * }
    * </code></pre>
    *
@@ -648,9 +648,9 @@ public final OperationFuture<Empty, KnowledgeOperationMetadata> deleteDocumentAs
    *   DeleteDocumentRequest request = DeleteDocumentRequest.newBuilder()
    *     .setName(name.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = documentsClient.deleteDocumentOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, KnowledgeOperationMetadata&gt; future = documentsClient.deleteDocumentOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
diff --git a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/EntityTypesClient.java b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/EntityTypesClient.java
index 180d58a04f2b..797c5ea48bc0 100644
--- a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/EntityTypesClient.java
+++ b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/EntityTypesClient.java
@@ -959,7 +959,7 @@ public final OperationFuture<BatchUpdateEntityTypesResponse, Struct> batchUpdate
    *   BatchUpdateEntityTypesRequest request = BatchUpdateEntityTypesRequest.newBuilder()
    *     .setParent(parent.toString())
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchUpdateEntityTypesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;BatchUpdateEntityTypesResponse, Struct&gt; future = entityTypesClient.batchUpdateEntityTypesOperationCallable().futureCall(request);
    *   // Do something
    *   BatchUpdateEntityTypesResponse response = future.get();
    * }
@@ -1012,7 +1012,7 @@ public final OperationFuture<BatchUpdateEntityTypesResponse, Struct> batchUpdate
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   ProjectAgentName parent = ProjectAgentName.of("[PROJECT]");
    *   List&lt;String&gt; entityTypeNames = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchDeleteEntityTypesAsync(parent, entityTypeNames).get();
+   *   entityTypesClient.batchDeleteEntityTypesAsync(parent, entityTypeNames).get();
    * }
    * </code></pre>
    *
@@ -1048,7 +1048,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntityTypesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   ProjectAgentName parent = ProjectAgentName.of("[PROJECT]");
    *   List&lt;String&gt; entityTypeNames = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchDeleteEntityTypesAsync(parent.toString(), entityTypeNames).get();
+   *   entityTypesClient.batchDeleteEntityTypesAsync(parent.toString(), entityTypeNames).get();
    * }
    * </code></pre>
    *
@@ -1088,7 +1088,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntityTypesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntityTypeNames(entityTypeNames)
    *     .build();
-   *   Empty response = entityTypesClient.batchDeleteEntityTypesAsync(request).get();
+   *   entityTypesClient.batchDeleteEntityTypesAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1119,9 +1119,9 @@ public final OperationFuture<Empty, Struct> batchDeleteEntityTypesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntityTypeNames(entityTypeNames)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchDeleteEntityTypesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = entityTypesClient.batchDeleteEntityTypesOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -1172,7 +1172,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntityTypesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(parent, entities).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(parent, entities).get();
    * }
    * </code></pre>
    *
@@ -1207,7 +1207,7 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(parent.toString(), entities).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(parent.toString(), entities).get();
    * }
    * </code></pre>
    *
@@ -1240,7 +1240,7 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(parent, entities, languageCode).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(parent, entities, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1281,7 +1281,7 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(parent.toString(), entities, languageCode).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(parent.toString(), entities, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1325,7 +1325,7 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntities(entities)
    *     .build();
-   *   Empty response = entityTypesClient.batchCreateEntitiesAsync(request).get();
+   *   entityTypesClient.batchCreateEntitiesAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1356,9 +1356,9 @@ public final OperationFuture<Empty, Struct> batchCreateEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntities(entities)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchCreateEntitiesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = entityTypesClient.batchCreateEntitiesOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -1408,7 +1408,7 @@ public final UnaryCallable<BatchCreateEntitiesRequest, Operation> batchCreateEnt
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(parent, entities).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(parent, entities).get();
    * }
    * </code></pre>
    *
@@ -1443,7 +1443,7 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(parent.toString(), entities).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(parent.toString(), entities).get();
    * }
    * </code></pre>
    *
@@ -1476,7 +1476,7 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(parent, entities, languageCode).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(parent, entities, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1517,7 +1517,7 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;EntityType.Entity&gt; entities = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(parent.toString(), entities, languageCode).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(parent.toString(), entities, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1561,7 +1561,7 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntities(entities)
    *     .build();
-   *   Empty response = entityTypesClient.batchUpdateEntitiesAsync(request).get();
+   *   entityTypesClient.batchUpdateEntitiesAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1592,9 +1592,9 @@ public final OperationFuture<Empty, Struct> batchUpdateEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntities(entities)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchUpdateEntitiesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = entityTypesClient.batchUpdateEntitiesOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
@@ -1644,7 +1644,7 @@ public final UnaryCallable<BatchUpdateEntitiesRequest, Operation> batchUpdateEnt
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;String&gt; entityValues = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(parent, entityValues).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(parent, entityValues).get();
    * }
    * </code></pre>
    *
@@ -1680,7 +1680,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    * try (EntityTypesClient entityTypesClient = EntityTypesClient.create()) {
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;String&gt; entityValues = new ArrayList&lt;&gt;();
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(parent.toString(), entityValues).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(parent.toString(), entityValues).get();
    * }
    * </code></pre>
    *
@@ -1717,7 +1717,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;String&gt; entityValues = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(parent, entityValues, languageCode).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(parent, entityValues, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1759,7 +1759,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    *   EntityTypeName parent = EntityTypeName.of("[PROJECT]", "[ENTITY_TYPE]");
    *   List&lt;String&gt; entityValues = new ArrayList&lt;&gt;();
    *   String languageCode = "";
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(parent.toString(), entityValues, languageCode).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(parent.toString(), entityValues, languageCode).get();
    * }
    * </code></pre>
    *
@@ -1804,7 +1804,7 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntityValues(entityValues)
    *     .build();
-   *   Empty response = entityTypesClient.batchDeleteEntitiesAsync(request).get();
+   *   entityTypesClient.batchDeleteEntitiesAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1835,9 +1835,9 @@ public final OperationFuture<Empty, Struct> batchDeleteEntitiesAsync(
    *     .setParent(parent.toString())
    *     .addAllEntityValues(entityValues)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = entityTypesClient.batchDeleteEntitiesOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = entityTypesClient.batchDeleteEntitiesOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
diff --git a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/IntentsClient.java b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/IntentsClient.java
index 57a802c8d785..a944178880e1 100644
--- a/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/IntentsClient.java
+++ b/google-cloud-clients/google-cloud-dialogflow/src/main/java/com/google/cloud/dialogflow/v2beta1/IntentsClient.java
@@ -971,7 +971,7 @@ public final OperationFuture<BatchUpdateIntentsResponse, Struct> batchUpdateInte
    *     .setParent(parent.toString())
    *     .setLanguageCode(languageCode)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = intentsClient.batchUpdateIntentsOperationCallable().futureCall(request);
+   *   OperationFuture&lt;BatchUpdateIntentsResponse, Struct&gt; future = intentsClient.batchUpdateIntentsOperationCallable().futureCall(request);
    *   // Do something
    *   BatchUpdateIntentsResponse response = future.get();
    * }
@@ -1022,7 +1022,7 @@ public final UnaryCallable<BatchUpdateIntentsRequest, Operation> batchUpdateInte
    * try (IntentsClient intentsClient = IntentsClient.create()) {
    *   ProjectAgentName parent = ProjectAgentName.of("[PROJECT]");
    *   List&lt;Intent&gt; intents = new ArrayList&lt;&gt;();
-   *   Empty response = intentsClient.batchDeleteIntentsAsync(parent, intents).get();
+   *   intentsClient.batchDeleteIntentsAsync(parent, intents).get();
    * }
    * </code></pre>
    *
@@ -1057,7 +1057,7 @@ public final OperationFuture<Empty, Struct> batchDeleteIntentsAsync(
    * try (IntentsClient intentsClient = IntentsClient.create()) {
    *   ProjectAgentName parent = ProjectAgentName.of("[PROJECT]");
    *   List&lt;Intent&gt; intents = new ArrayList&lt;&gt;();
-   *   Empty response = intentsClient.batchDeleteIntentsAsync(parent.toString(), intents).get();
+   *   intentsClient.batchDeleteIntentsAsync(parent.toString(), intents).get();
    * }
    * </code></pre>
    *
@@ -1093,7 +1093,7 @@ public final OperationFuture<Empty, Struct> batchDeleteIntentsAsync(
    *     .setParent(parent.toString())
    *     .addAllIntents(intents)
    *     .build();
-   *   Empty response = intentsClient.batchDeleteIntentsAsync(request).get();
+   *   intentsClient.batchDeleteIntentsAsync(request).get();
    * }
    * </code></pre>
    *
@@ -1123,9 +1123,9 @@ public final OperationFuture<Empty, Struct> batchDeleteIntentsAsync(
    *     .setParent(parent.toString())
    *     .addAllIntents(intents)
    *     .build();
-   *   OperationFuture&lt;Operation&gt; future = intentsClient.batchDeleteIntentsOperationCallable().futureCall(request);
+   *   OperationFuture&lt;Empty, Struct&gt; future = intentsClient.batchDeleteIntentsOperationCallable().futureCall(request);
    *   // Do something
-   *   Empty response = future.get();
+   *   future.get();
    * }
    * </code></pre>
    */
diff --git a/google-cloud-clients/google-cloud-dialogflow/synth.metadata b/google-cloud-clients/google-cloud-dialogflow/synth.metadata
index 1833730c6840..ff26c85e702c 100644
--- a/google-cloud-clients/google-cloud-dialogflow/synth.metadata
+++ b/google-cloud-clients/google-cloud-dialogflow/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-01-17T08:42:27.093781Z",
+  "updateTime": "2019-02-02T08:39:12.110087Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.6",
-        "dockerImage": "googleapis/artman@sha256:12722f2ca3fbc3b53cc6aa5f0e569d7d221b46bd876a2136497089dec5e3634e"
+        "version": "0.16.8",
+        "dockerImage": "googleapis/artman@sha256:75bc07ef34a1de9895c18af54dc503ed3b3f3b52e85062e3360a979d2a0741e7"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "0ac60e21a1aa86c07c1836865b35308ba8178b05",
-        "internalRef": "229626798"
+        "sha": "bce093dab3e65c40eb9a37efbdc960f34df6037a",
+        "internalRef": "231974277"
       }
     }
   ],