diff --git a/README.md b/README.md
index 8eb21c15b..e8593c9e8 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ If you are using Maven without the BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.53.0')
+implementation platform('com.google.cloud:libraries-bom:26.54.0')
 
 implementation 'com.google.cloud:google-cloud-pubsub'
 ```
diff --git a/generation_config.yaml b/generation_config.yaml
index 00bdfd854..3a2e07ac0 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,6 +1,6 @@
 gapic_generator_version: 2.52.0
-googleapis_commitish: 0ce8062889f30daa64eed6810e3c124ccd89608f
-libraries_bom_version: 26.53.0
+googleapis_commitish: 0a459af4362c0e41b9723dd4d7edc022c552db40
+libraries_bom_version: 26.54.0
 libraries:
   - api_shortname: pubsub
     name_pretty: Cloud Pub/Sub
diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java
index 544f5e247..c18683cf6 100644
--- a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java
+++ b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java
@@ -880,6 +880,7 @@ public final Subscription createSubscription(
    *           .setTopicMessageRetentionDuration(Duration.newBuilder().build())
    *           .setAnalyticsHubSubscriptionInfo(
    *               Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+   *           .addAllMessageTransforms(new ArrayList<MessageTransform>())
    *           .build();
    *   Subscription response = subscriptionAdminClient.createSubscription(request);
    * }
@@ -1145,6 +1146,7 @@ public final Subscription createSubscription(
    *           .setTopicMessageRetentionDuration(Duration.newBuilder().build())
    *           .setAnalyticsHubSubscriptionInfo(
    *               Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+   *           .addAllMessageTransforms(new ArrayList<MessageTransform>())
    *           .build();
    *   ApiFuture<Subscription> future =
    *       subscriptionAdminClient.createSubscriptionCallable().futureCall(request);
diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/TopicAdminClient.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/TopicAdminClient.java
index 28b77c12b..2e635ba43 100644
--- a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/TopicAdminClient.java
+++ b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/TopicAdminClient.java
@@ -516,6 +516,7 @@ public final Topic createTopic(ProjectTopicName name) {
    *           .setSatisfiesPzs(true)
    *           .setMessageRetentionDuration(Duration.newBuilder().build())
    *           .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+   *           .addAllMessageTransforms(new ArrayList<MessageTransform>())
    *           .build();
    *   Topic response = topicAdminClient.createTopic(request);
    * }
@@ -552,6 +553,7 @@ public final Topic createTopic(Topic request) {
    *           .setSatisfiesPzs(true)
    *           .setMessageRetentionDuration(Duration.newBuilder().build())
    *           .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+   *           .addAllMessageTransforms(new ArrayList<MessageTransform>())
    *           .build();
    *   ApiFuture<Topic> future = topicAdminClient.createTopicCallable().futureCall(request);
    *   // Do something.
diff --git a/google-cloud-pubsub/src/main/resources/META-INF/native-image/com.google.cloud.pubsub.v1/reflect-config.json b/google-cloud-pubsub/src/main/resources/META-INF/native-image/com.google.cloud.pubsub.v1/reflect-config.json
index a818e377d..3c5de9478 100644
--- a/google-cloud-pubsub/src/main/resources/META-INF/native-image/com.google.cloud.pubsub.v1/reflect-config.json
+++ b/google-cloud-pubsub/src/main/resources/META-INF/native-image/com.google.cloud.pubsub.v1/reflect-config.json
@@ -2195,6 +2195,24 @@
     "allDeclaredClasses": true,
     "allPublicClasses": true
   },
+  {
+    "name": "com.google.pubsub.v1.JavaScriptUDF",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.pubsub.v1.JavaScriptUDF$Builder",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
   {
     "name": "com.google.pubsub.v1.ListSchemaRevisionsRequest",
     "queryAllDeclaredConstructors": true,
@@ -2465,6 +2483,24 @@
     "allDeclaredClasses": true,
     "allPublicClasses": true
   },
+  {
+    "name": "com.google.pubsub.v1.MessageTransform",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.pubsub.v1.MessageTransform$Builder",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
   {
     "name": "com.google.pubsub.v1.ModifyAckDeadlineRequest",
     "queryAllDeclaredConstructors": true,
diff --git a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/SubscriptionAdminClientHttpJsonTest.java b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/SubscriptionAdminClientHttpJsonTest.java
index 59adc7841..711c8da98 100644
--- a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/SubscriptionAdminClientHttpJsonTest.java
+++ b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/SubscriptionAdminClientHttpJsonTest.java
@@ -49,6 +49,7 @@
 import com.google.pubsub.v1.ExpirationPolicy;
 import com.google.pubsub.v1.ListSnapshotsResponse;
 import com.google.pubsub.v1.ListSubscriptionsResponse;
+import com.google.pubsub.v1.MessageTransform;
 import com.google.pubsub.v1.ProjectName;
 import com.google.pubsub.v1.PullResponse;
 import com.google.pubsub.v1.PushConfig;
@@ -133,6 +134,7 @@ public void createSubscriptionTest() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -202,6 +204,7 @@ public void createSubscriptionTest2() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -271,6 +274,7 @@ public void createSubscriptionTest3() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -340,6 +344,7 @@ public void createSubscriptionTest4() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -409,6 +414,7 @@ public void getSubscriptionTest() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -471,6 +477,7 @@ public void getSubscriptionTest2() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -533,6 +540,7 @@ public void updateSubscriptionTest() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -557,6 +565,7 @@ public void updateSubscriptionTest() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     FieldMask updateMask = FieldMask.newBuilder().build();
 
@@ -607,6 +616,7 @@ public void updateSubscriptionExceptionTest() throws Exception {
               .setTopicMessageRetentionDuration(Duration.newBuilder().build())
               .setAnalyticsHubSubscriptionInfo(
                   Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+              .addAllMessageTransforms(new ArrayList<MessageTransform>())
               .build();
       FieldMask updateMask = FieldMask.newBuilder().build();
       client.updateSubscription(subscription, updateMask);
diff --git a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/SubscriptionAdminClientTest.java b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/SubscriptionAdminClientTest.java
index 005b32b9c..6df11d0a0 100644
--- a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/SubscriptionAdminClientTest.java
+++ b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/SubscriptionAdminClientTest.java
@@ -59,6 +59,7 @@
 import com.google.pubsub.v1.ListSnapshotsResponse;
 import com.google.pubsub.v1.ListSubscriptionsRequest;
 import com.google.pubsub.v1.ListSubscriptionsResponse;
+import com.google.pubsub.v1.MessageTransform;
 import com.google.pubsub.v1.ModifyAckDeadlineRequest;
 import com.google.pubsub.v1.ModifyPushConfigRequest;
 import com.google.pubsub.v1.ProjectName;
@@ -159,6 +160,7 @@ public void createSubscriptionTest() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockSubscriber.addResponse(expectedResponse);
 
@@ -225,6 +227,7 @@ public void createSubscriptionTest2() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockSubscriber.addResponse(expectedResponse);
 
@@ -291,6 +294,7 @@ public void createSubscriptionTest3() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockSubscriber.addResponse(expectedResponse);
 
@@ -357,6 +361,7 @@ public void createSubscriptionTest4() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockSubscriber.addResponse(expectedResponse);
 
@@ -423,6 +428,7 @@ public void getSubscriptionTest() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockSubscriber.addResponse(expectedResponse);
 
@@ -479,6 +485,7 @@ public void getSubscriptionTest2() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockSubscriber.addResponse(expectedResponse);
 
@@ -535,6 +542,7 @@ public void updateSubscriptionTest() throws Exception {
             .setTopicMessageRetentionDuration(Duration.newBuilder().build())
             .setAnalyticsHubSubscriptionInfo(
                 Subscription.AnalyticsHubSubscriptionInfo.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockSubscriber.addResponse(expectedResponse);
 
diff --git a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/TopicAdminClientHttpJsonTest.java b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/TopicAdminClientHttpJsonTest.java
index fd1ac7c90..5a1e1e68a 100644
--- a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/TopicAdminClientHttpJsonTest.java
+++ b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/TopicAdminClientHttpJsonTest.java
@@ -50,6 +50,7 @@
 import com.google.pubsub.v1.ListTopicSubscriptionsResponse;
 import com.google.pubsub.v1.ListTopicsResponse;
 import com.google.pubsub.v1.MessageStoragePolicy;
+import com.google.pubsub.v1.MessageTransform;
 import com.google.pubsub.v1.ProjectName;
 import com.google.pubsub.v1.PublishResponse;
 import com.google.pubsub.v1.PubsubMessage;
@@ -117,6 +118,7 @@ public void createTopicTest() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -168,6 +170,7 @@ public void createTopicTest2() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -219,6 +222,7 @@ public void updateTopicTest() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -232,6 +236,7 @@ public void updateTopicTest() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     FieldMask updateMask = FieldMask.newBuilder().build();
 
@@ -271,6 +276,7 @@ public void updateTopicExceptionTest() throws Exception {
               .setSatisfiesPzs(true)
               .setMessageRetentionDuration(Duration.newBuilder().build())
               .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+              .addAllMessageTransforms(new ArrayList<MessageTransform>())
               .build();
       FieldMask updateMask = FieldMask.newBuilder().build();
       client.updateTopic(topic, updateMask);
@@ -380,6 +386,7 @@ public void getTopicTest() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
@@ -431,6 +438,7 @@ public void getTopicTest2() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockService.addResponse(expectedResponse);
 
diff --git a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/TopicAdminClientTest.java b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/TopicAdminClientTest.java
index 775b93750..d1e05afde 100644
--- a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/TopicAdminClientTest.java
+++ b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/TopicAdminClientTest.java
@@ -53,6 +53,7 @@
 import com.google.pubsub.v1.ListTopicsRequest;
 import com.google.pubsub.v1.ListTopicsResponse;
 import com.google.pubsub.v1.MessageStoragePolicy;
+import com.google.pubsub.v1.MessageTransform;
 import com.google.pubsub.v1.ProjectName;
 import com.google.pubsub.v1.PublishRequest;
 import com.google.pubsub.v1.PublishResponse;
@@ -131,6 +132,7 @@ public void createTopicTest() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockPublisher.addResponse(expectedResponse);
 
@@ -176,6 +178,7 @@ public void createTopicTest2() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockPublisher.addResponse(expectedResponse);
 
@@ -221,6 +224,7 @@ public void updateTopicTest() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockPublisher.addResponse(expectedResponse);
 
@@ -347,6 +351,7 @@ public void getTopicTest() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockPublisher.addResponse(expectedResponse);
 
@@ -392,6 +397,7 @@ public void getTopicTest2() throws Exception {
             .setSatisfiesPzs(true)
             .setMessageRetentionDuration(Duration.newBuilder().build())
             .setIngestionDataSourceSettings(IngestionDataSourceSettings.newBuilder().build())
+            .addAllMessageTransforms(new ArrayList<MessageTransform>())
             .build();
     mockPublisher.addResponse(expectedResponse);
 
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSchemaRevisionRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSchemaRevisionRequest.java
index d92256e6f..3d4db9d4c 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSchemaRevisionRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSchemaRevisionRequest.java
@@ -142,7 +142,7 @@ public com.google.protobuf.ByteString getNameBytes() {
    * </code>
    *
    * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-   *     google/pubsub/v1/schema.proto;l=331
+   *     google/pubsub/v1/schema.proto;l=330
    * @return The revisionId.
    */
   @java.lang.Override
@@ -171,7 +171,7 @@ public java.lang.String getRevisionId() {
    * </code>
    *
    * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-   *     google/pubsub/v1/schema.proto;l=331
+   *     google/pubsub/v1/schema.proto;l=330
    * @return The bytes for revisionId.
    */
   @java.lang.Override
@@ -699,7 +699,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
      * </code>
      *
      * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-     *     google/pubsub/v1/schema.proto;l=331
+     *     google/pubsub/v1/schema.proto;l=330
      * @return The revisionId.
      */
     @java.lang.Deprecated
@@ -727,7 +727,7 @@ public java.lang.String getRevisionId() {
      * </code>
      *
      * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-     *     google/pubsub/v1/schema.proto;l=331
+     *     google/pubsub/v1/schema.proto;l=330
      * @return The bytes for revisionId.
      */
     @java.lang.Deprecated
@@ -755,7 +755,7 @@ public com.google.protobuf.ByteString getRevisionIdBytes() {
      * </code>
      *
      * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-     *     google/pubsub/v1/schema.proto;l=331
+     *     google/pubsub/v1/schema.proto;l=330
      * @param value The revisionId to set.
      * @return This builder for chaining.
      */
@@ -782,7 +782,7 @@ public Builder setRevisionId(java.lang.String value) {
      * </code>
      *
      * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-     *     google/pubsub/v1/schema.proto;l=331
+     *     google/pubsub/v1/schema.proto;l=330
      * @return This builder for chaining.
      */
     @java.lang.Deprecated
@@ -805,7 +805,7 @@ public Builder clearRevisionId() {
      * </code>
      *
      * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-     *     google/pubsub/v1/schema.proto;l=331
+     *     google/pubsub/v1/schema.proto;l=330
      * @param value The bytes for revisionId to set.
      * @return This builder for chaining.
      */
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSchemaRevisionRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSchemaRevisionRequestOrBuilder.java
index b5cf5e110..b8d8f0620 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSchemaRevisionRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSchemaRevisionRequestOrBuilder.java
@@ -72,7 +72,7 @@ public interface DeleteSchemaRevisionRequestOrBuilder
    * </code>
    *
    * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-   *     google/pubsub/v1/schema.proto;l=331
+   *     google/pubsub/v1/schema.proto;l=330
    * @return The revisionId.
    */
   @java.lang.Deprecated
@@ -90,7 +90,7 @@ public interface DeleteSchemaRevisionRequestOrBuilder
    * </code>
    *
    * @deprecated google.pubsub.v1.DeleteSchemaRevisionRequest.revision_id is deprecated. See
-   *     google/pubsub/v1/schema.proto;l=331
+   *     google/pubsub/v1/schema.proto;l=330
    * @return The bytes for revisionId.
    */
   @java.lang.Deprecated
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/JavaScriptUDF.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/JavaScriptUDF.java
new file mode 100644
index 000000000..f5b467deb
--- /dev/null
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/JavaScriptUDF.java
@@ -0,0 +1,1015 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/pubsub/v1/pubsub.proto
+
+// Protobuf Java Version: 3.25.5
+package com.google.pubsub.v1;
+
+/**
+ *
+ *
+ * <pre>
+ * User-defined JavaScript function that can transform or filter a Pub/Sub
+ * message.
+ * </pre>
+ *
+ * Protobuf type {@code google.pubsub.v1.JavaScriptUDF}
+ */
+public final class JavaScriptUDF extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.pubsub.v1.JavaScriptUDF)
+    JavaScriptUDFOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use JavaScriptUDF.newBuilder() to construct.
+  private JavaScriptUDF(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private JavaScriptUDF() {
+    functionName_ = "";
+    code_ = "";
+  }
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new JavaScriptUDF();
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.pubsub.v1.PubsubProto
+        .internal_static_google_pubsub_v1_JavaScriptUDF_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.pubsub.v1.PubsubProto
+        .internal_static_google_pubsub_v1_JavaScriptUDF_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.pubsub.v1.JavaScriptUDF.class,
+            com.google.pubsub.v1.JavaScriptUDF.Builder.class);
+  }
+
+  public static final int FUNCTION_NAME_FIELD_NUMBER = 1;
+
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object functionName_ = "";
+  /**
+   *
+   *
+   * <pre>
+   * Required. Name of the JavasScript function that should applied to Pub/Sub
+   * messages.
+   * </pre>
+   *
+   * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The functionName.
+   */
+  @java.lang.Override
+  public java.lang.String getFunctionName() {
+    java.lang.Object ref = functionName_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      functionName_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. Name of the JavasScript function that should applied to Pub/Sub
+   * messages.
+   * </pre>
+   *
+   * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for functionName.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getFunctionNameBytes() {
+    java.lang.Object ref = functionName_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      functionName_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int CODE_FIELD_NUMBER = 2;
+
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object code_ = "";
+  /**
+   *
+   *
+   * <pre>
+   * Required. JavaScript code that contains a function `function_name` with the
+   * below signature:
+   *
+   * ```
+   *   /&#42;*
+   *   * Transforms a Pub/Sub message.
+   *
+   *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+   *   * filter a message, return `null`. To transform a message return a map
+   *   * with the following keys:
+   *   *   - (required) 'data' : {string}
+   *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+   *   * Returning empty `attributes` will remove all attributes from the
+   *   * message.
+   *   *
+   *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+   *   * message. Keys:
+   *   *   - (required) 'data' : {string}
+   *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+   *   *
+   *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+   *   * Keys:
+   *   *   - (required) 'message_id'  : {string}
+   *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+   *   *   - (optional) 'ordering_key': {string}
+   *   *&#47;
+   *
+   *   function &lt;function_name&gt;(message, metadata) {
+   *   }
+   * ```
+   * </pre>
+   *
+   * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The code.
+   */
+  @java.lang.Override
+  public java.lang.String getCode() {
+    java.lang.Object ref = code_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      code_ = s;
+      return s;
+    }
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Required. JavaScript code that contains a function `function_name` with the
+   * below signature:
+   *
+   * ```
+   *   /&#42;*
+   *   * Transforms a Pub/Sub message.
+   *
+   *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+   *   * filter a message, return `null`. To transform a message return a map
+   *   * with the following keys:
+   *   *   - (required) 'data' : {string}
+   *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+   *   * Returning empty `attributes` will remove all attributes from the
+   *   * message.
+   *   *
+   *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+   *   * message. Keys:
+   *   *   - (required) 'data' : {string}
+   *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+   *   *
+   *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+   *   * Keys:
+   *   *   - (required) 'message_id'  : {string}
+   *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+   *   *   - (optional) 'ordering_key': {string}
+   *   *&#47;
+   *
+   *   function &lt;function_name&gt;(message, metadata) {
+   *   }
+   * ```
+   * </pre>
+   *
+   * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for code.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getCodeBytes() {
+    java.lang.Object ref = code_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      code_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(functionName_)) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, functionName_);
+    }
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(code_)) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, code_);
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(functionName_)) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, functionName_);
+    }
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(code_)) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, code_);
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.pubsub.v1.JavaScriptUDF)) {
+      return super.equals(obj);
+    }
+    com.google.pubsub.v1.JavaScriptUDF other = (com.google.pubsub.v1.JavaScriptUDF) obj;
+
+    if (!getFunctionName().equals(other.getFunctionName())) return false;
+    if (!getCode().equals(other.getCode())) return false;
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + FUNCTION_NAME_FIELD_NUMBER;
+    hash = (53 * hash) + getFunctionName().hashCode();
+    hash = (37 * hash) + CODE_FIELD_NUMBER;
+    hash = (53 * hash) + getCode().hashCode();
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.pubsub.v1.JavaScriptUDF prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * User-defined JavaScript function that can transform or filter a Pub/Sub
+   * message.
+   * </pre>
+   *
+   * Protobuf type {@code google.pubsub.v1.JavaScriptUDF}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.pubsub.v1.JavaScriptUDF)
+      com.google.pubsub.v1.JavaScriptUDFOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.pubsub.v1.PubsubProto
+          .internal_static_google_pubsub_v1_JavaScriptUDF_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.pubsub.v1.PubsubProto
+          .internal_static_google_pubsub_v1_JavaScriptUDF_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.pubsub.v1.JavaScriptUDF.class,
+              com.google.pubsub.v1.JavaScriptUDF.Builder.class);
+    }
+
+    // Construct using com.google.pubsub.v1.JavaScriptUDF.newBuilder()
+    private Builder() {}
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      functionName_ = "";
+      code_ = "";
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.pubsub.v1.PubsubProto
+          .internal_static_google_pubsub_v1_JavaScriptUDF_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.pubsub.v1.JavaScriptUDF getDefaultInstanceForType() {
+      return com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.pubsub.v1.JavaScriptUDF build() {
+      com.google.pubsub.v1.JavaScriptUDF result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.pubsub.v1.JavaScriptUDF buildPartial() {
+      com.google.pubsub.v1.JavaScriptUDF result = new com.google.pubsub.v1.JavaScriptUDF(this);
+      if (bitField0_ != 0) {
+        buildPartial0(result);
+      }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.pubsub.v1.JavaScriptUDF result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.functionName_ = functionName_;
+      }
+      if (((from_bitField0_ & 0x00000002) != 0)) {
+        result.code_ = code_;
+      }
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.pubsub.v1.JavaScriptUDF) {
+        return mergeFrom((com.google.pubsub.v1.JavaScriptUDF) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.pubsub.v1.JavaScriptUDF other) {
+      if (other == com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance()) return this;
+      if (!other.getFunctionName().isEmpty()) {
+        functionName_ = other.functionName_;
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      if (!other.getCode().isEmpty()) {
+        code_ = other.code_;
+        bitField0_ |= 0x00000002;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10:
+              {
+                functionName_ = input.readStringRequireUtf8();
+                bitField0_ |= 0x00000001;
+                break;
+              } // case 10
+            case 18:
+              {
+                code_ = input.readStringRequireUtf8();
+                bitField0_ |= 0x00000002;
+                break;
+              } // case 18
+            default:
+              {
+                if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                  done = true; // was an endgroup tag
+                }
+                break;
+              } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.lang.Object functionName_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. Name of the JavasScript function that should applied to Pub/Sub
+     * messages.
+     * </pre>
+     *
+     * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The functionName.
+     */
+    public java.lang.String getFunctionName() {
+      java.lang.Object ref = functionName_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        functionName_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Name of the JavasScript function that should applied to Pub/Sub
+     * messages.
+     * </pre>
+     *
+     * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for functionName.
+     */
+    public com.google.protobuf.ByteString getFunctionNameBytes() {
+      java.lang.Object ref = functionName_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        functionName_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Name of the JavasScript function that should applied to Pub/Sub
+     * messages.
+     * </pre>
+     *
+     * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The functionName to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFunctionName(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      functionName_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Name of the JavasScript function that should applied to Pub/Sub
+     * messages.
+     * </pre>
+     *
+     * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearFunctionName() {
+      functionName_ = getDefaultInstance().getFunctionName();
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. Name of the JavasScript function that should applied to Pub/Sub
+     * messages.
+     * </pre>
+     *
+     * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for functionName to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFunctionNameBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      functionName_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object code_ = "";
+    /**
+     *
+     *
+     * <pre>
+     * Required. JavaScript code that contains a function `function_name` with the
+     * below signature:
+     *
+     * ```
+     *   /&#42;*
+     *   * Transforms a Pub/Sub message.
+     *
+     *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+     *   * filter a message, return `null`. To transform a message return a map
+     *   * with the following keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+     *   * Returning empty `attributes` will remove all attributes from the
+     *   * message.
+     *   *
+     *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+     *   * message. Keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+     *   *
+     *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+     *   * Keys:
+     *   *   - (required) 'message_id'  : {string}
+     *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+     *   *   - (optional) 'ordering_key': {string}
+     *   *&#47;
+     *
+     *   function &lt;function_name&gt;(message, metadata) {
+     *   }
+     * ```
+     * </pre>
+     *
+     * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The code.
+     */
+    public java.lang.String getCode() {
+      java.lang.Object ref = code_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        code_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. JavaScript code that contains a function `function_name` with the
+     * below signature:
+     *
+     * ```
+     *   /&#42;*
+     *   * Transforms a Pub/Sub message.
+     *
+     *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+     *   * filter a message, return `null`. To transform a message return a map
+     *   * with the following keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+     *   * Returning empty `attributes` will remove all attributes from the
+     *   * message.
+     *   *
+     *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+     *   * message. Keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+     *   *
+     *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+     *   * Keys:
+     *   *   - (required) 'message_id'  : {string}
+     *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+     *   *   - (optional) 'ordering_key': {string}
+     *   *&#47;
+     *
+     *   function &lt;function_name&gt;(message, metadata) {
+     *   }
+     * ```
+     * </pre>
+     *
+     * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return The bytes for code.
+     */
+    public com.google.protobuf.ByteString getCodeBytes() {
+      java.lang.Object ref = code_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        code_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. JavaScript code that contains a function `function_name` with the
+     * below signature:
+     *
+     * ```
+     *   /&#42;*
+     *   * Transforms a Pub/Sub message.
+     *
+     *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+     *   * filter a message, return `null`. To transform a message return a map
+     *   * with the following keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+     *   * Returning empty `attributes` will remove all attributes from the
+     *   * message.
+     *   *
+     *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+     *   * message. Keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+     *   *
+     *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+     *   * Keys:
+     *   *   - (required) 'message_id'  : {string}
+     *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+     *   *   - (optional) 'ordering_key': {string}
+     *   *&#47;
+     *
+     *   function &lt;function_name&gt;(message, metadata) {
+     *   }
+     * ```
+     * </pre>
+     *
+     * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The code to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCode(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      code_ = value;
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. JavaScript code that contains a function `function_name` with the
+     * below signature:
+     *
+     * ```
+     *   /&#42;*
+     *   * Transforms a Pub/Sub message.
+     *
+     *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+     *   * filter a message, return `null`. To transform a message return a map
+     *   * with the following keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+     *   * Returning empty `attributes` will remove all attributes from the
+     *   * message.
+     *   *
+     *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+     *   * message. Keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+     *   *
+     *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+     *   * Keys:
+     *   *   - (required) 'message_id'  : {string}
+     *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+     *   *   - (optional) 'ordering_key': {string}
+     *   *&#47;
+     *
+     *   function &lt;function_name&gt;(message, metadata) {
+     *   }
+     * ```
+     * </pre>
+     *
+     * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearCode() {
+      code_ = getDefaultInstance().getCode();
+      bitField0_ = (bitField0_ & ~0x00000002);
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Required. JavaScript code that contains a function `function_name` with the
+     * below signature:
+     *
+     * ```
+     *   /&#42;*
+     *   * Transforms a Pub/Sub message.
+     *
+     *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+     *   * filter a message, return `null`. To transform a message return a map
+     *   * with the following keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+     *   * Returning empty `attributes` will remove all attributes from the
+     *   * message.
+     *   *
+     *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+     *   * message. Keys:
+     *   *   - (required) 'data' : {string}
+     *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+     *   *
+     *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+     *   * Keys:
+     *   *   - (required) 'message_id'  : {string}
+     *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+     *   *   - (optional) 'ordering_key': {string}
+     *   *&#47;
+     *
+     *   function &lt;function_name&gt;(message, metadata) {
+     *   }
+     * ```
+     * </pre>
+     *
+     * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     *
+     * @param value The bytes for code to set.
+     * @return This builder for chaining.
+     */
+    public Builder setCodeBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      code_ = value;
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.pubsub.v1.JavaScriptUDF)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.pubsub.v1.JavaScriptUDF)
+  private static final com.google.pubsub.v1.JavaScriptUDF DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.pubsub.v1.JavaScriptUDF();
+  }
+
+  public static com.google.pubsub.v1.JavaScriptUDF getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<JavaScriptUDF> PARSER =
+      new com.google.protobuf.AbstractParser<JavaScriptUDF>() {
+        @java.lang.Override
+        public JavaScriptUDF parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          Builder builder = newBuilder();
+          try {
+            builder.mergeFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.setUnfinishedMessage(builder.buildPartial());
+          } catch (com.google.protobuf.UninitializedMessageException e) {
+            throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+          } catch (java.io.IOException e) {
+            throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                .setUnfinishedMessage(builder.buildPartial());
+          }
+          return builder.buildPartial();
+        }
+      };
+
+  public static com.google.protobuf.Parser<JavaScriptUDF> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<JavaScriptUDF> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.pubsub.v1.JavaScriptUDF getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/JavaScriptUDFOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/JavaScriptUDFOrBuilder.java
new file mode 100644
index 000000000..2be71ea24
--- /dev/null
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/JavaScriptUDFOrBuilder.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/pubsub/v1/pubsub.proto
+
+// Protobuf Java Version: 3.25.5
+package com.google.pubsub.v1;
+
+public interface JavaScriptUDFOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.pubsub.v1.JavaScriptUDF)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. Name of the JavasScript function that should applied to Pub/Sub
+   * messages.
+   * </pre>
+   *
+   * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The functionName.
+   */
+  java.lang.String getFunctionName();
+  /**
+   *
+   *
+   * <pre>
+   * Required. Name of the JavasScript function that should applied to Pub/Sub
+   * messages.
+   * </pre>
+   *
+   * <code>string function_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for functionName.
+   */
+  com.google.protobuf.ByteString getFunctionNameBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * Required. JavaScript code that contains a function `function_name` with the
+   * below signature:
+   *
+   * ```
+   *   /&#42;*
+   *   * Transforms a Pub/Sub message.
+   *
+   *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+   *   * filter a message, return `null`. To transform a message return a map
+   *   * with the following keys:
+   *   *   - (required) 'data' : {string}
+   *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+   *   * Returning empty `attributes` will remove all attributes from the
+   *   * message.
+   *   *
+   *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+   *   * message. Keys:
+   *   *   - (required) 'data' : {string}
+   *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+   *   *
+   *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+   *   * Keys:
+   *   *   - (required) 'message_id'  : {string}
+   *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+   *   *   - (optional) 'ordering_key': {string}
+   *   *&#47;
+   *
+   *   function &lt;function_name&gt;(message, metadata) {
+   *   }
+   * ```
+   * </pre>
+   *
+   * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The code.
+   */
+  java.lang.String getCode();
+  /**
+   *
+   *
+   * <pre>
+   * Required. JavaScript code that contains a function `function_name` with the
+   * below signature:
+   *
+   * ```
+   *   /&#42;*
+   *   * Transforms a Pub/Sub message.
+   *
+   *   * &#64;return {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;|null)} - To
+   *   * filter a message, return `null`. To transform a message return a map
+   *   * with the following keys:
+   *   *   - (required) 'data' : {string}
+   *   *   - (optional) 'attributes' : {Object&lt;string, string&gt;}
+   *   * Returning empty `attributes` will remove all attributes from the
+   *   * message.
+   *   *
+   *   * &#64;param  {(Object&lt;string, (string | Object&lt;string, string&gt;)&gt;} Pub/Sub
+   *   * message. Keys:
+   *   *   - (required) 'data' : {string}
+   *   *   - (required) 'attributes' : {Object&lt;string, string&gt;}
+   *   *
+   *   * &#64;param  {Object&lt;string, any&gt;} metadata - Pub/Sub message metadata.
+   *   * Keys:
+   *   *   - (required) 'message_id'  : {string}
+   *   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+   *   *   - (optional) 'ordering_key': {string}
+   *   *&#47;
+   *
+   *   function &lt;function_name&gt;(message, metadata) {
+   *   }
+   * ```
+   * </pre>
+   *
+   * <code>string code = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+   *
+   * @return The bytes for code.
+   */
+  com.google.protobuf.ByteString getCodeBytes();
+}
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/MessageTransform.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/MessageTransform.java
new file mode 100644
index 000000000..3e077acea
--- /dev/null
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/MessageTransform.java
@@ -0,0 +1,944 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/pubsub/v1/pubsub.proto
+
+// Protobuf Java Version: 3.25.5
+package com.google.pubsub.v1;
+
+/**
+ *
+ *
+ * <pre>
+ * All supported message transforms types.
+ * </pre>
+ *
+ * Protobuf type {@code google.pubsub.v1.MessageTransform}
+ */
+public final class MessageTransform extends com.google.protobuf.GeneratedMessageV3
+    implements
+    // @@protoc_insertion_point(message_implements:google.pubsub.v1.MessageTransform)
+    MessageTransformOrBuilder {
+  private static final long serialVersionUID = 0L;
+  // Use MessageTransform.newBuilder() to construct.
+  private MessageTransform(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+
+  private MessageTransform() {}
+
+  @java.lang.Override
+  @SuppressWarnings({"unused"})
+  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+    return new MessageTransform();
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.pubsub.v1.PubsubProto
+        .internal_static_google_pubsub_v1_MessageTransform_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.pubsub.v1.PubsubProto
+        .internal_static_google_pubsub_v1_MessageTransform_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.pubsub.v1.MessageTransform.class,
+            com.google.pubsub.v1.MessageTransform.Builder.class);
+  }
+
+  private int transformCase_ = 0;
+
+  @SuppressWarnings("serial")
+  private java.lang.Object transform_;
+
+  public enum TransformCase
+      implements
+          com.google.protobuf.Internal.EnumLite,
+          com.google.protobuf.AbstractMessage.InternalOneOfEnum {
+    JAVASCRIPT_UDF(2),
+    TRANSFORM_NOT_SET(0);
+    private final int value;
+
+    private TransformCase(int value) {
+      this.value = value;
+    }
+    /**
+     * @param value The number of the enum to look for.
+     * @return The enum associated with the given number.
+     * @deprecated Use {@link #forNumber(int)} instead.
+     */
+    @java.lang.Deprecated
+    public static TransformCase valueOf(int value) {
+      return forNumber(value);
+    }
+
+    public static TransformCase forNumber(int value) {
+      switch (value) {
+        case 2:
+          return JAVASCRIPT_UDF;
+        case 0:
+          return TRANSFORM_NOT_SET;
+        default:
+          return null;
+      }
+    }
+
+    public int getNumber() {
+      return this.value;
+    }
+  };
+
+  public TransformCase getTransformCase() {
+    return TransformCase.forNumber(transformCase_);
+  }
+
+  public static final int JAVASCRIPT_UDF_FIELD_NUMBER = 2;
+  /**
+   *
+   *
+   * <pre>
+   * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+   * are specified on a resource, each must have a unique `function_name`.
+   * </pre>
+   *
+   * <code>
+   * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   *
+   * @return Whether the javascriptUdf field is set.
+   */
+  @java.lang.Override
+  public boolean hasJavascriptUdf() {
+    return transformCase_ == 2;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+   * are specified on a resource, each must have a unique `function_name`.
+   * </pre>
+   *
+   * <code>
+   * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   *
+   * @return The javascriptUdf.
+   */
+  @java.lang.Override
+  public com.google.pubsub.v1.JavaScriptUDF getJavascriptUdf() {
+    if (transformCase_ == 2) {
+      return (com.google.pubsub.v1.JavaScriptUDF) transform_;
+    }
+    return com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+   * are specified on a resource, each must have a unique `function_name`.
+   * </pre>
+   *
+   * <code>
+   * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.pubsub.v1.JavaScriptUDFOrBuilder getJavascriptUdfOrBuilder() {
+    if (transformCase_ == 2) {
+      return (com.google.pubsub.v1.JavaScriptUDF) transform_;
+    }
+    return com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance();
+  }
+
+  public static final int ENABLED_FIELD_NUMBER = 3;
+  private boolean enabled_ = false;
+  /**
+   *
+   *
+   * <pre>
+   * Optional. If set to true, the transform is enabled. If false, the transform
+   * is disabled and will not be applied to messages. Defaults to `true`.
+   * </pre>
+   *
+   * <code>bool enabled = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
+   *
+   * @return The enabled.
+   */
+  @java.lang.Override
+  public boolean getEnabled() {
+    return enabled_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (transformCase_ == 2) {
+      output.writeMessage(2, (com.google.pubsub.v1.JavaScriptUDF) transform_);
+    }
+    if (enabled_ != false) {
+      output.writeBool(3, enabled_);
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (transformCase_ == 2) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              2, (com.google.pubsub.v1.JavaScriptUDF) transform_);
+    }
+    if (enabled_ != false) {
+      size += com.google.protobuf.CodedOutputStream.computeBoolSize(3, enabled_);
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.pubsub.v1.MessageTransform)) {
+      return super.equals(obj);
+    }
+    com.google.pubsub.v1.MessageTransform other = (com.google.pubsub.v1.MessageTransform) obj;
+
+    if (getEnabled() != other.getEnabled()) return false;
+    if (!getTransformCase().equals(other.getTransformCase())) return false;
+    switch (transformCase_) {
+      case 2:
+        if (!getJavascriptUdf().equals(other.getJavascriptUdf())) return false;
+        break;
+      case 0:
+      default:
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + ENABLED_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashBoolean(getEnabled());
+    switch (transformCase_) {
+      case 2:
+        hash = (37 * hash) + JAVASCRIPT_UDF_FIELD_NUMBER;
+        hash = (53 * hash) + getJavascriptUdf().hashCode();
+        break;
+      case 0:
+      default:
+    }
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.pubsub.v1.MessageTransform parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.pubsub.v1.MessageTransform prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * All supported message transforms types.
+   * </pre>
+   *
+   * Protobuf type {@code google.pubsub.v1.MessageTransform}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.pubsub.v1.MessageTransform)
+      com.google.pubsub.v1.MessageTransformOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.pubsub.v1.PubsubProto
+          .internal_static_google_pubsub_v1_MessageTransform_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.pubsub.v1.PubsubProto
+          .internal_static_google_pubsub_v1_MessageTransform_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.pubsub.v1.MessageTransform.class,
+              com.google.pubsub.v1.MessageTransform.Builder.class);
+    }
+
+    // Construct using com.google.pubsub.v1.MessageTransform.newBuilder()
+    private Builder() {}
+
+    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      super(parent);
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      if (javascriptUdfBuilder_ != null) {
+        javascriptUdfBuilder_.clear();
+      }
+      enabled_ = false;
+      transformCase_ = 0;
+      transform_ = null;
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.pubsub.v1.PubsubProto
+          .internal_static_google_pubsub_v1_MessageTransform_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.pubsub.v1.MessageTransform getDefaultInstanceForType() {
+      return com.google.pubsub.v1.MessageTransform.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.pubsub.v1.MessageTransform build() {
+      com.google.pubsub.v1.MessageTransform result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.pubsub.v1.MessageTransform buildPartial() {
+      com.google.pubsub.v1.MessageTransform result =
+          new com.google.pubsub.v1.MessageTransform(this);
+      if (bitField0_ != 0) {
+        buildPartial0(result);
+      }
+      buildPartialOneofs(result);
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.pubsub.v1.MessageTransform result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000002) != 0)) {
+        result.enabled_ = enabled_;
+      }
+    }
+
+    private void buildPartialOneofs(com.google.pubsub.v1.MessageTransform result) {
+      result.transformCase_ = transformCase_;
+      result.transform_ = this.transform_;
+      if (transformCase_ == 2 && javascriptUdfBuilder_ != null) {
+        result.transform_ = javascriptUdfBuilder_.build();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clone() {
+      return super.clone();
+    }
+
+    @java.lang.Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.setField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+
+    @java.lang.Override
+    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+
+    @java.lang.Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+
+    @java.lang.Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+      return super.addRepeatedField(field, value);
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.pubsub.v1.MessageTransform) {
+        return mergeFrom((com.google.pubsub.v1.MessageTransform) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.pubsub.v1.MessageTransform other) {
+      if (other == com.google.pubsub.v1.MessageTransform.getDefaultInstance()) return this;
+      if (other.getEnabled() != false) {
+        setEnabled(other.getEnabled());
+      }
+      switch (other.getTransformCase()) {
+        case JAVASCRIPT_UDF:
+          {
+            mergeJavascriptUdf(other.getJavascriptUdf());
+            break;
+          }
+        case TRANSFORM_NOT_SET:
+          {
+            break;
+          }
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 18:
+              {
+                input.readMessage(getJavascriptUdfFieldBuilder().getBuilder(), extensionRegistry);
+                transformCase_ = 2;
+                break;
+              } // case 18
+            case 24:
+              {
+                enabled_ = input.readBool();
+                bitField0_ |= 0x00000002;
+                break;
+              } // case 24
+            default:
+              {
+                if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                  done = true; // was an endgroup tag
+                }
+                break;
+              } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+
+    private int transformCase_ = 0;
+    private java.lang.Object transform_;
+
+    public TransformCase getTransformCase() {
+      return TransformCase.forNumber(transformCase_);
+    }
+
+    public Builder clearTransform() {
+      transformCase_ = 0;
+      transform_ = null;
+      onChanged();
+      return this;
+    }
+
+    private int bitField0_;
+
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.pubsub.v1.JavaScriptUDF,
+            com.google.pubsub.v1.JavaScriptUDF.Builder,
+            com.google.pubsub.v1.JavaScriptUDFOrBuilder>
+        javascriptUdfBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     *
+     * @return Whether the javascriptUdf field is set.
+     */
+    @java.lang.Override
+    public boolean hasJavascriptUdf() {
+      return transformCase_ == 2;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     *
+     * @return The javascriptUdf.
+     */
+    @java.lang.Override
+    public com.google.pubsub.v1.JavaScriptUDF getJavascriptUdf() {
+      if (javascriptUdfBuilder_ == null) {
+        if (transformCase_ == 2) {
+          return (com.google.pubsub.v1.JavaScriptUDF) transform_;
+        }
+        return com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance();
+      } else {
+        if (transformCase_ == 2) {
+          return javascriptUdfBuilder_.getMessage();
+        }
+        return com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder setJavascriptUdf(com.google.pubsub.v1.JavaScriptUDF value) {
+      if (javascriptUdfBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        transform_ = value;
+        onChanged();
+      } else {
+        javascriptUdfBuilder_.setMessage(value);
+      }
+      transformCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder setJavascriptUdf(com.google.pubsub.v1.JavaScriptUDF.Builder builderForValue) {
+      if (javascriptUdfBuilder_ == null) {
+        transform_ = builderForValue.build();
+        onChanged();
+      } else {
+        javascriptUdfBuilder_.setMessage(builderForValue.build());
+      }
+      transformCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder mergeJavascriptUdf(com.google.pubsub.v1.JavaScriptUDF value) {
+      if (javascriptUdfBuilder_ == null) {
+        if (transformCase_ == 2
+            && transform_ != com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance()) {
+          transform_ =
+              com.google.pubsub.v1.JavaScriptUDF.newBuilder(
+                      (com.google.pubsub.v1.JavaScriptUDF) transform_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          transform_ = value;
+        }
+        onChanged();
+      } else {
+        if (transformCase_ == 2) {
+          javascriptUdfBuilder_.mergeFrom(value);
+        } else {
+          javascriptUdfBuilder_.setMessage(value);
+        }
+      }
+      transformCase_ = 2;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder clearJavascriptUdf() {
+      if (javascriptUdfBuilder_ == null) {
+        if (transformCase_ == 2) {
+          transformCase_ = 0;
+          transform_ = null;
+          onChanged();
+        }
+      } else {
+        if (transformCase_ == 2) {
+          transformCase_ = 0;
+          transform_ = null;
+        }
+        javascriptUdfBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.JavaScriptUDF.Builder getJavascriptUdfBuilder() {
+      return getJavascriptUdfFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    @java.lang.Override
+    public com.google.pubsub.v1.JavaScriptUDFOrBuilder getJavascriptUdfOrBuilder() {
+      if ((transformCase_ == 2) && (javascriptUdfBuilder_ != null)) {
+        return javascriptUdfBuilder_.getMessageOrBuilder();
+      } else {
+        if (transformCase_ == 2) {
+          return (com.google.pubsub.v1.JavaScriptUDF) transform_;
+        }
+        return com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+     * are specified on a resource, each must have a unique `function_name`.
+     * </pre>
+     *
+     * <code>
+     * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.pubsub.v1.JavaScriptUDF,
+            com.google.pubsub.v1.JavaScriptUDF.Builder,
+            com.google.pubsub.v1.JavaScriptUDFOrBuilder>
+        getJavascriptUdfFieldBuilder() {
+      if (javascriptUdfBuilder_ == null) {
+        if (!(transformCase_ == 2)) {
+          transform_ = com.google.pubsub.v1.JavaScriptUDF.getDefaultInstance();
+        }
+        javascriptUdfBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.pubsub.v1.JavaScriptUDF,
+                com.google.pubsub.v1.JavaScriptUDF.Builder,
+                com.google.pubsub.v1.JavaScriptUDFOrBuilder>(
+                (com.google.pubsub.v1.JavaScriptUDF) transform_, getParentForChildren(), isClean());
+        transform_ = null;
+      }
+      transformCase_ = 2;
+      onChanged();
+      return javascriptUdfBuilder_;
+    }
+
+    private boolean enabled_;
+    /**
+     *
+     *
+     * <pre>
+     * Optional. If set to true, the transform is enabled. If false, the transform
+     * is disabled and will not be applied to messages. Defaults to `true`.
+     * </pre>
+     *
+     * <code>bool enabled = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
+     *
+     * @return The enabled.
+     */
+    @java.lang.Override
+    public boolean getEnabled() {
+      return enabled_;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. If set to true, the transform is enabled. If false, the transform
+     * is disabled and will not be applied to messages. Defaults to `true`.
+     * </pre>
+     *
+     * <code>bool enabled = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
+     *
+     * @param value The enabled to set.
+     * @return This builder for chaining.
+     */
+    public Builder setEnabled(boolean value) {
+
+      enabled_ = value;
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. If set to true, the transform is enabled. If false, the transform
+     * is disabled and will not be applied to messages. Defaults to `true`.
+     * </pre>
+     *
+     * <code>bool enabled = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearEnabled() {
+      bitField0_ = (bitField0_ & ~0x00000002);
+      enabled_ = false;
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @java.lang.Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.pubsub.v1.MessageTransform)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.pubsub.v1.MessageTransform)
+  private static final com.google.pubsub.v1.MessageTransform DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.pubsub.v1.MessageTransform();
+  }
+
+  public static com.google.pubsub.v1.MessageTransform getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<MessageTransform> PARSER =
+      new com.google.protobuf.AbstractParser<MessageTransform>() {
+        @java.lang.Override
+        public MessageTransform parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          Builder builder = newBuilder();
+          try {
+            builder.mergeFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.setUnfinishedMessage(builder.buildPartial());
+          } catch (com.google.protobuf.UninitializedMessageException e) {
+            throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+          } catch (java.io.IOException e) {
+            throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                .setUnfinishedMessage(builder.buildPartial());
+          }
+          return builder.buildPartial();
+        }
+      };
+
+  public static com.google.protobuf.Parser<MessageTransform> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<MessageTransform> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.pubsub.v1.MessageTransform getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/MessageTransformOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/MessageTransformOrBuilder.java
new file mode 100644
index 000000000..8744837b1
--- /dev/null
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/MessageTransformOrBuilder.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: google/pubsub/v1/pubsub.proto
+
+// Protobuf Java Version: 3.25.5
+package com.google.pubsub.v1;
+
+public interface MessageTransformOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.pubsub.v1.MessageTransform)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+   * are specified on a resource, each must have a unique `function_name`.
+   * </pre>
+   *
+   * <code>
+   * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   *
+   * @return Whether the javascriptUdf field is set.
+   */
+  boolean hasJavascriptUdf();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+   * are specified on a resource, each must have a unique `function_name`.
+   * </pre>
+   *
+   * <code>
+   * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   *
+   * @return The javascriptUdf.
+   */
+  com.google.pubsub.v1.JavaScriptUDF getJavascriptUdf();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+   * are specified on a resource, each must have a unique `function_name`.
+   * </pre>
+   *
+   * <code>
+   * .google.pubsub.v1.JavaScriptUDF javascript_udf = 2 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  com.google.pubsub.v1.JavaScriptUDFOrBuilder getJavascriptUdfOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. If set to true, the transform is enabled. If false, the transform
+   * is disabled and will not be applied to messages. Defaults to `true`.
+   * </pre>
+   *
+   * <code>bool enabled = 3 [(.google.api.field_behavior) = OPTIONAL];</code>
+   *
+   * @return The enabled.
+   */
+  boolean getEnabled();
+
+  com.google.pubsub.v1.MessageTransform.TransformCase getTransformCase();
+}
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PubsubProto.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PubsubProto.java
index 57f1e97fc..e3124be2c 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PubsubProto.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PubsubProto.java
@@ -104,6 +104,14 @@ public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry r
       internal_static_google_pubsub_v1_IngestionFailureEvent_ConfluentCloudFailureReason_descriptor;
   static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_google_pubsub_v1_IngestionFailureEvent_ConfluentCloudFailureReason_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_pubsub_v1_JavaScriptUDF_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_pubsub_v1_JavaScriptUDF_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_pubsub_v1_MessageTransform_descriptor;
+  static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_google_pubsub_v1_MessageTransform_fieldAccessorTable;
   static final com.google.protobuf.Descriptors.Descriptor
       internal_static_google_pubsub_v1_Topic_descriptor;
   static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
@@ -483,352 +491,362 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "t\030\004 \001(\003B\003\340A\001\022_\n\024api_violation_reason\030\005 \001"
           + "(\0132:.google.pubsub.v1.IngestionFailureEv"
           + "ent.ApiViolationReasonB\003\340A\001H\000B\010\n\006reasonB"
-          + "\t\n\007failure\"\272\005\n\005Topic\022\021\n\004name\030\001 \001(\tB\003\340A\002\022"
-          + "8\n\006labels\030\002 \003(\0132#.google.pubsub.v1.Topic"
-          + ".LabelsEntryB\003\340A\001\022K\n\026message_storage_pol"
-          + "icy\030\003 \001(\0132&.google.pubsub.v1.MessageStor"
-          + "agePolicyB\003\340A\001\022\031\n\014kms_key_name\030\005 \001(\tB\003\340A"
-          + "\001\022>\n\017schema_settings\030\006 \001(\0132 .google.pubs"
-          + "ub.v1.SchemaSettingsB\003\340A\001\022\032\n\rsatisfies_p"
-          + "zs\030\007 \001(\010B\003\340A\001\022B\n\032message_retention_durat"
-          + "ion\030\010 \001(\0132\031.google.protobuf.DurationB\003\340A"
-          + "\001\0221\n\005state\030\t \001(\0162\035.google.pubsub.v1.Topi"
-          + "c.StateB\003\340A\003\022Z\n\036ingestion_data_source_se"
-          + "ttings\030\n \001(\0132-.google.pubsub.v1.Ingestio"
-          + "nDataSourceSettingsB\003\340A\001\032-\n\013LabelsEntry\022"
-          + "\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"H\n\005State"
-          + "\022\025\n\021STATE_UNSPECIFIED\020\000\022\n\n\006ACTIVE\020\001\022\034\n\030I"
-          + "NGESTION_RESOURCE_ERROR\020\002:T\352AQ\n\033pubsub.g"
-          + "oogleapis.com/Topic\022!projects/{project}/"
-          + "topics/{topic}\022\017_deleted-topic_\"\200\002\n\rPubs"
-          + "ubMessage\022\021\n\004data\030\001 \001(\014B\003\340A\001\022H\n\nattribut"
-          + "es\030\002 \003(\0132/.google.pubsub.v1.PubsubMessag"
-          + "e.AttributesEntryB\003\340A\001\022\022\n\nmessage_id\030\003 \001"
-          + "(\t\0220\n\014publish_time\030\004 \001(\0132\032.google.protob"
-          + "uf.Timestamp\022\031\n\014ordering_key\030\005 \001(\tB\003\340A\001\032"
-          + "1\n\017AttributesEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value"
-          + "\030\002 \001(\t:\0028\001\"E\n\017GetTopicRequest\0222\n\005topic\030\001"
-          + " \001(\tB#\340A\002\372A\035\n\033pubsub.googleapis.com/Topi"
-          + "c\"w\n\022UpdateTopicRequest\022+\n\005topic\030\001 \001(\0132\027"
-          + ".google.pubsub.v1.TopicB\003\340A\002\0224\n\013update_m"
-          + "ask\030\002 \001(\0132\032.google.protobuf.FieldMaskB\003\340"
-          + "A\002\"|\n\016PublishRequest\0222\n\005topic\030\001 \001(\tB#\340A\002"
-          + "\372A\035\n\033pubsub.googleapis.com/Topic\0226\n\010mess"
-          + "ages\030\002 \003(\0132\037.google.pubsub.v1.PubsubMess"
-          + "ageB\003\340A\002\"+\n\017PublishResponse\022\030\n\013message_i"
-          + "ds\030\001 \003(\tB\003\340A\001\"\212\001\n\021ListTopicsRequest\022D\n\007p"
-          + "roject\030\001 \001(\tB3\340A\002\372A-\n+cloudresourcemanag"
-          + "er.googleapis.com/Project\022\026\n\tpage_size\030\002"
-          + " \001(\005B\003\340A\001\022\027\n\npage_token\030\003 \001(\tB\003\340A\001\"`\n\022Li"
-          + "stTopicsResponse\022,\n\006topics\030\001 \003(\0132\027.googl"
-          + "e.pubsub.v1.TopicB\003\340A\001\022\034\n\017next_page_toke"
-          + "n\030\002 \001(\tB\003\340A\001\"\204\001\n\035ListTopicSubscriptionsR"
-          + "equest\0222\n\005topic\030\001 \001(\tB#\340A\002\372A\035\n\033pubsub.go"
-          + "ogleapis.com/Topic\022\026\n\tpage_size\030\002 \001(\005B\003\340"
-          + "A\001\022\027\n\npage_token\030\003 \001(\tB\003\340A\001\"\201\001\n\036ListTopi"
-          + "cSubscriptionsResponse\022A\n\rsubscriptions\030"
-          + "\001 \003(\tB*\340A\001\372A$\n\"pubsub.googleapis.com/Sub"
-          + "scription\022\034\n\017next_page_token\030\002 \001(\tB\003\340A\001\""
-          + "\200\001\n\031ListTopicSnapshotsRequest\0222\n\005topic\030\001"
-          + " \001(\tB#\340A\002\372A\035\n\033pubsub.googleapis.com/Topi"
-          + "c\022\026\n\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\npage_token\030"
-          + "\003 \001(\tB\003\340A\001\"R\n\032ListTopicSnapshotsResponse"
-          + "\022\026\n\tsnapshots\030\001 \003(\tB\003\340A\001\022\034\n\017next_page_to"
-          + "ken\030\002 \001(\tB\003\340A\001\"H\n\022DeleteTopicRequest\0222\n\005"
-          + "topic\030\001 \001(\tB#\340A\002\372A\035\n\033pubsub.googleapis.c"
-          + "om/Topic\"]\n\031DetachSubscriptionRequest\022@\n"
-          + "\014subscription\030\001 \001(\tB*\340A\002\372A$\n\"pubsub.goog"
-          + "leapis.com/Subscription\"\034\n\032DetachSubscri"
-          + "ptionResponse\"\253\n\n\014Subscription\022\021\n\004name\030\001"
-          + " \001(\tB\003\340A\002\0222\n\005topic\030\002 \001(\tB#\340A\002\372A\035\n\033pubsub"
-          + ".googleapis.com/Topic\0226\n\013push_config\030\004 \001"
-          + "(\0132\034.google.pubsub.v1.PushConfigB\003\340A\001\022>\n"
-          + "\017bigquery_config\030\022 \001(\0132 .google.pubsub.v"
-          + "1.BigQueryConfigB\003\340A\001\022G\n\024cloud_storage_c"
-          + "onfig\030\026 \001(\0132$.google.pubsub.v1.CloudStor"
-          + "ageConfigB\003\340A\001\022!\n\024ack_deadline_seconds\030\005"
-          + " \001(\005B\003\340A\001\022\"\n\025retain_acked_messages\030\007 \001(\010"
-          + "B\003\340A\001\022B\n\032message_retention_duration\030\010 \001("
-          + "\0132\031.google.protobuf.DurationB\003\340A\001\022?\n\006lab"
-          + "els\030\t \003(\0132*.google.pubsub.v1.Subscriptio"
-          + "n.LabelsEntryB\003\340A\001\022$\n\027enable_message_ord"
-          + "ering\030\n \001(\010B\003\340A\001\022B\n\021expiration_policy\030\013 "
-          + "\001(\0132\".google.pubsub.v1.ExpirationPolicyB"
-          + "\003\340A\001\022\023\n\006filter\030\014 \001(\tB\003\340A\001\022C\n\022dead_letter"
-          + "_policy\030\r \001(\0132\".google.pubsub.v1.DeadLet"
-          + "terPolicyB\003\340A\001\0228\n\014retry_policy\030\016 \001(\0132\035.g"
-          + "oogle.pubsub.v1.RetryPolicyB\003\340A\001\022\025\n\010deta"
-          + "ched\030\017 \001(\010B\003\340A\001\022)\n\034enable_exactly_once_d"
-          + "elivery\030\020 \001(\010B\003\340A\001\022H\n topic_message_rete"
-          + "ntion_duration\030\021 \001(\0132\031.google.protobuf.D"
-          + "urationB\003\340A\003\0228\n\005state\030\023 \001(\0162$.google.pub"
-          + "sub.v1.Subscription.StateB\003\340A\003\022i\n\037analyt"
-          + "ics_hub_subscription_info\030\027 \001(\0132;.google"
-          + ".pubsub.v1.Subscription.AnalyticsHubSubs"
-          + "criptionInfoB\003\340A\003\032O\n\034AnalyticsHubSubscri"
-          + "ptionInfo\022\024\n\007listing\030\001 \001(\tB\003\340A\001\022\031\n\014subsc"
-          + "ription\030\002 \001(\tB\003\340A\001\032-\n\013LabelsEntry\022\013\n\003key"
-          + "\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\">\n\005State\022\025\n\021ST"
-          + "ATE_UNSPECIFIED\020\000\022\n\n\006ACTIVE\020\001\022\022\n\016RESOURC"
-          + "E_ERROR\020\002:X\352AU\n\"pubsub.googleapis.com/Su"
-          + "bscription\022/projects/{project}/subscript"
-          + "ions/{subscription}\"\177\n\013RetryPolicy\0227\n\017mi"
-          + "nimum_backoff\030\001 \001(\0132\031.google.protobuf.Du"
-          + "rationB\003\340A\001\0227\n\017maximum_backoff\030\002 \001(\0132\031.g"
-          + "oogle.protobuf.DurationB\003\340A\001\"V\n\020DeadLett"
-          + "erPolicy\022\036\n\021dead_letter_topic\030\001 \001(\tB\003\340A\001"
-          + "\022\"\n\025max_delivery_attempts\030\002 \001(\005B\003\340A\001\"?\n\020"
-          + "ExpirationPolicy\022+\n\003ttl\030\001 \001(\0132\031.google.p"
-          + "rotobuf.DurationB\003\340A\001\"\232\004\n\nPushConfig\022\032\n\r"
-          + "push_endpoint\030\001 \001(\tB\003\340A\001\022E\n\nattributes\030\002"
-          + " \003(\0132,.google.pubsub.v1.PushConfig.Attri"
-          + "butesEntryB\003\340A\001\022A\n\noidc_token\030\003 \001(\0132&.go"
-          + "ogle.pubsub.v1.PushConfig.OidcTokenB\003\340A\001"
-          + "H\000\022I\n\016pubsub_wrapper\030\004 \001(\0132*.google.pubs"
-          + "ub.v1.PushConfig.PubsubWrapperB\003\340A\001H\001\022A\n"
-          + "\nno_wrapper\030\005 \001(\0132&.google.pubsub.v1.Pus"
-          + "hConfig.NoWrapperB\003\340A\001H\001\032F\n\tOidcToken\022\"\n"
-          + "\025service_account_email\030\001 \001(\tB\003\340A\001\022\025\n\010aud"
-          + "ience\030\002 \001(\tB\003\340A\001\032\017\n\rPubsubWrapper\032(\n\tNoW"
-          + "rapper\022\033\n\016write_metadata\030\001 \001(\010B\003\340A\001\0321\n\017A"
-          + "ttributesEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001"
-          + "(\t:\0028\001B\027\n\025authentication_methodB\t\n\007wrapp"
-          + "er\"\216\003\n\016BigQueryConfig\022\022\n\005table\030\001 \001(\tB\003\340A"
-          + "\001\022\035\n\020use_topic_schema\030\002 \001(\010B\003\340A\001\022\033\n\016writ"
-          + "e_metadata\030\003 \001(\010B\003\340A\001\022 \n\023drop_unknown_fi"
-          + "elds\030\004 \001(\010B\003\340A\001\022:\n\005state\030\005 \001(\0162&.google."
-          + "pubsub.v1.BigQueryConfig.StateB\003\340A\003\022\035\n\020u"
-          + "se_table_schema\030\006 \001(\010B\003\340A\001\022\"\n\025service_ac"
-          + "count_email\030\007 \001(\tB\003\340A\001\"\212\001\n\005State\022\025\n\021STAT"
-          + "E_UNSPECIFIED\020\000\022\n\n\006ACTIVE\020\001\022\025\n\021PERMISSIO"
-          + "N_DENIED\020\002\022\r\n\tNOT_FOUND\020\003\022\023\n\017SCHEMA_MISM"
-          + "ATCH\020\004\022#\n\037IN_TRANSIT_LOCATION_RESTRICTIO"
-          + "N\020\005\"\351\005\n\022CloudStorageConfig\022\023\n\006bucket\030\001 \001"
-          + "(\tB\003\340A\002\022\034\n\017filename_prefix\030\002 \001(\tB\003\340A\001\022\034\n"
-          + "\017filename_suffix\030\003 \001(\tB\003\340A\001\022%\n\030filename_"
-          + "datetime_format\030\n \001(\tB\003\340A\001\022K\n\013text_confi"
-          + "g\030\004 \001(\0132/.google.pubsub.v1.CloudStorageC"
-          + "onfig.TextConfigB\003\340A\001H\000\022K\n\013avro_config\030\005"
-          + " \001(\0132/.google.pubsub.v1.CloudStorageConf"
-          + "ig.AvroConfigB\003\340A\001H\000\0224\n\014max_duration\030\006 \001"
-          + "(\0132\031.google.protobuf.DurationB\003\340A\001\022\026\n\tma"
-          + "x_bytes\030\007 \001(\003B\003\340A\001\022\031\n\014max_messages\030\010 \001(\003"
-          + "B\003\340A\001\022>\n\005state\030\t \001(\0162*.google.pubsub.v1."
-          + "CloudStorageConfig.StateB\003\340A\003\022\"\n\025service"
-          + "_account_email\030\013 \001(\tB\003\340A\001\032\014\n\nTextConfig\032"
-          + "H\n\nAvroConfig\022\033\n\016write_metadata\030\001 \001(\010B\003\340"
-          + "A\001\022\035\n\020use_topic_schema\030\002 \001(\010B\003\340A\001\"\212\001\n\005St"
-          + "ate\022\025\n\021STATE_UNSPECIFIED\020\000\022\n\n\006ACTIVE\020\001\022\025"
-          + "\n\021PERMISSION_DENIED\020\002\022\r\n\tNOT_FOUND\020\003\022#\n\037"
-          + "IN_TRANSIT_LOCATION_RESTRICTION\020\004\022\023\n\017SCH"
-          + "EMA_MISMATCH\020\005B\017\n\routput_format\"|\n\017Recei"
-          + "vedMessage\022\023\n\006ack_id\030\001 \001(\tB\003\340A\001\0225\n\007messa"
-          + "ge\030\002 \001(\0132\037.google.pubsub.v1.PubsubMessag"
-          + "eB\003\340A\001\022\035\n\020delivery_attempt\030\003 \001(\005B\003\340A\001\"Z\n"
-          + "\026GetSubscriptionRequest\022@\n\014subscription\030"
-          + "\001 \001(\tB*\340A\002\372A$\n\"pubsub.googleapis.com/Sub"
-          + "scription\"\214\001\n\031UpdateSubscriptionRequest\022"
-          + "9\n\014subscription\030\001 \001(\0132\036.google.pubsub.v1"
-          + ".SubscriptionB\003\340A\002\0224\n\013update_mask\030\002 \001(\0132"
-          + "\032.google.protobuf.FieldMaskB\003\340A\002\"\221\001\n\030Lis"
-          + "tSubscriptionsRequest\022D\n\007project\030\001 \001(\tB3"
-          + "\340A\002\372A-\n+cloudresourcemanager.googleapis."
-          + "com/Project\022\026\n\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\np"
-          + "age_token\030\003 \001(\tB\003\340A\001\"u\n\031ListSubscription"
-          + "sResponse\022:\n\rsubscriptions\030\001 \003(\0132\036.googl"
-          + "e.pubsub.v1.SubscriptionB\003\340A\001\022\034\n\017next_pa"
-          + "ge_token\030\002 \001(\tB\003\340A\001\"]\n\031DeleteSubscriptio"
-          + "nRequest\022@\n\014subscription\030\001 \001(\tB*\340A\002\372A$\n\""
-          + "pubsub.googleapis.com/Subscription\"\223\001\n\027M"
-          + "odifyPushConfigRequest\022@\n\014subscription\030\001"
-          + " \001(\tB*\340A\002\372A$\n\"pubsub.googleapis.com/Subs"
-          + "cription\0226\n\013push_config\030\002 \001(\0132\034.google.p"
-          + "ubsub.v1.PushConfigB\003\340A\002\"\215\001\n\013PullRequest"
-          + "\022@\n\014subscription\030\001 \001(\tB*\340A\002\372A$\n\"pubsub.g"
-          + "oogleapis.com/Subscription\022!\n\022return_imm"
-          + "ediately\030\002 \001(\010B\005\030\001\340A\001\022\031\n\014max_messages\030\003 "
-          + "\001(\005B\003\340A\002\"Q\n\014PullResponse\022A\n\021received_mes"
-          + "sages\030\001 \003(\0132!.google.pubsub.v1.ReceivedM"
-          + "essageB\003\340A\001\"\225\001\n\030ModifyAckDeadlineRequest"
-          + "\022@\n\014subscription\030\001 \001(\tB*\340A\002\372A$\n\"pubsub.g"
-          + "oogleapis.com/Subscription\022\024\n\007ack_ids\030\004 "
-          + "\003(\tB\003\340A\002\022!\n\024ack_deadline_seconds\030\003 \001(\005B\003"
-          + "\340A\002\"l\n\022AcknowledgeRequest\022@\n\014subscriptio"
-          + "n\030\001 \001(\tB*\340A\002\372A$\n\"pubsub.googleapis.com/S"
-          + "ubscription\022\024\n\007ack_ids\030\002 \003(\tB\003\340A\002\"\307\002\n\024St"
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-          + "tion\022\024\n\007ack_ids\030\002 \003(\tB\003\340A\001\022$\n\027modify_dea"
-          + "dline_seconds\030\003 \003(\005B\003\340A\001\022$\n\027modify_deadl"
-          + "ine_ack_ids\030\004 \003(\tB\003\340A\001\022(\n\033stream_ack_dea"
-          + "dline_seconds\030\005 \001(\005B\003\340A\002\022\026\n\tclient_id\030\006 "
-          + "\001(\tB\003\340A\001\022%\n\030max_outstanding_messages\030\007 \001"
-          + "(\003B\003\340A\001\022\"\n\025max_outstanding_bytes\030\010 \001(\003B\003"
-          + "\340A\001\"\236\006\n\025StreamingPullResponse\022A\n\021receive"
+          + "\t\n\007failure\">\n\rJavaScriptUDF\022\032\n\rfunction_"
+          + "name\030\001 \001(\tB\003\340A\002\022\021\n\004code\030\002 \001(\tB\003\340A\002\"u\n\020Me"
+          + "ssageTransform\022>\n\016javascript_udf\030\002 \001(\0132\037"
+          + ".google.pubsub.v1.JavaScriptUDFB\003\340A\001H\000\022\024"
+          + "\n\007enabled\030\003 \001(\010B\003\340A\001B\013\n\ttransform\"\216\006\n\005To"
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+          + "\022K\n\026message_storage_policy\030\003 \001(\0132&.googl"
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+          + "\014kms_key_name\030\005 \001(\tB\003\340A\001\022>\n\017schema_setti"
+          + "ngs\030\006 \001(\0132 .google.pubsub.v1.SchemaSetti"
+          + "ngsB\003\340A\001\022\032\n\rsatisfies_pzs\030\007 \001(\010B\003\340A\001\022B\n\032"
+          + "message_retention_duration\030\010 \001(\0132\031.googl"
+          + "e.protobuf.DurationB\003\340A\001\0221\n\005state\030\t \001(\0162"
+          + "\035.google.pubsub.v1.Topic.StateB\003\340A\003\022Z\n\036i"
+          + "ngestion_data_source_settings\030\n \001(\0132-.go"
+          + "ogle.pubsub.v1.IngestionDataSourceSettin"
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+          + "CTIVE\020\001\022\034\n\030INGESTION_RESOURCE_ERROR\020\002:c\352"
+          + "A`\n\033pubsub.googleapis.com/Topic\022!project"
+          + "s/{project}/topics/{topic}\022\017_deleted-top"
+          + "ic_*\006topics2\005topic\"\200\002\n\rPubsubMessage\022\021\n\004"
+          + "data\030\001 \001(\014B\003\340A\001\022H\n\nattributes\030\002 \003(\0132/.go"
+          + "ogle.pubsub.v1.PubsubMessage.AttributesE"
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+          + "\031\n\014ordering_key\030\005 \001(\tB\003\340A\001\0321\n\017Attributes"
+          + "Entry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"E\n"
+          + "\017GetTopicRequest\0222\n\005topic\030\001 \001(\tB#\340A\002\372A\035\n"
+          + "\033pubsub.googleapis.com/Topic\"w\n\022UpdateTo"
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+          + "oogle.protobuf.FieldMaskB\003\340A\002\"|\n\016Publish"
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+          + "google.pubsub.v1.PubsubMessageB\003\340A\002\"+\n\017P"
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+          + "\"\212\001\n\021ListTopicsRequest\022D\n\007project\030\001 \001(\tB"
+          + "3\340A\002\372A-\n+cloudresourcemanager.googleapis"
+          + ".com/Project\022\026\n\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\n"
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+          + "opicB\003\340A\001\022\034\n\017next_page_token\030\002 \001(\tB\003\340A\001\""
+          + "\204\001\n\035ListTopicSubscriptionsRequest\0222\n\005top"
+          + "ic\030\001 \001(\tB#\340A\002\372A\035\n\033pubsub.googleapis.com/"
+          + "Topic\022\026\n\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\npage_to"
+          + "ken\030\003 \001(\tB\003\340A\001\"\201\001\n\036ListTopicSubscription"
+          + "sResponse\022A\n\rsubscriptions\030\001 \003(\tB*\340A\001\372A$"
+          + "\n\"pubsub.googleapis.com/Subscription\022\034\n\017"
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+          + "\032ListTopicSnapshotsResponse\022\026\n\tsnapshots"
+          + "\030\001 \003(\tB\003\340A\001\022\034\n\017next_page_token\030\002 \001(\tB\003\340A"
+          + "\001\"H\n\022DeleteTopicRequest\0222\n\005topic\030\001 \001(\tB#"
+          + "\340A\002\372A\035\n\033pubsub.googleapis.com/Topic\"]\n\031D"
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+          + "retain_acked_messages\030\007 \001(\010B\003\340A\001\022B\n\032mess"
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+          + "otobuf.DurationB\003\340A\001\022?\n\006labels\030\t \003(\0132*.g"
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+          + "IVE\020\001\022\022\n\016RESOURCE_ERROR\020\002:u\352Ar\n\"pubsub.g"
+          + "oogleapis.com/Subscription\022/projects/{pr"
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+          + "ogle.pubsub.v1.BigQueryConfig.StateB\003\340A\003"
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+          + "ICTION\020\005\"\351\005\n\022CloudStorageConfig\022\023\n\006bucke"
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+          + "ReceivedMessage\022\023\n\006ack_id\030\001 \001(\tB\003\340A\001\0225\n\007"
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+          + "A\001\"Z\n\026GetSubscriptionRequest\022@\n\014subscrip"
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+          + "m/Subscription\"\214\001\n\031UpdateSubscriptionReq"
+          + "uest\0229\n\014subscription\030\001 \001(\0132\036.google.pubs"
+          + "ub.v1.SubscriptionB\003\340A\002\0224\n\013update_mask\030\002"
+          + " \001(\0132\032.google.protobuf.FieldMaskB\003\340A\002\"\221\001"
+          + "\n\030ListSubscriptionsRequest\022D\n\007project\030\001 "
+          + "\001(\tB3\340A\002\372A-\n+cloudresourcemanager.google"
+          + "apis.com/Project\022\026\n\tpage_size\030\002 \001(\005B\003\340A\001"
+          + "\022\027\n\npage_token\030\003 \001(\tB\003\340A\001\"u\n\031ListSubscri"
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+          + "google.pubsub.v1.SubscriptionB\003\340A\001\022\034\n\017ne"
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+          + "\223\001\n\027ModifyPushConfigRequest\022@\n\014subscript"
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+          + "sub.googleapis.com/Subscription\022!\n\022retur"
+          + "n_immediately\030\002 \001(\010B\005\030\001\340A\001\022\031\n\014max_messag"
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-          + " \001(\t:\0028\001:L\352AI\n\036pubsub.googleapis.com/Sna"
-          + "pshot\022\'projects/{project}/snapshots/{sna"
-          + "pshot}\"N\n\022GetSnapshotRequest\0228\n\010snapshot"
+          + "ivedMessageB\003\340A\001\"\225\001\n\030ModifyAckDeadlineRe"
+          + "quest\022@\n\014subscription\030\001 \001(\tB*\340A\002\372A$\n\"pub"
+          + "sub.googleapis.com/Subscription\022\024\n\007ack_i"
+          + "ds\030\004 \003(\tB\003\340A\002\022!\n\024ack_deadline_seconds\030\003 "
+          + "\001(\005B\003\340A\002\"l\n\022AcknowledgeRequest\022@\n\014subscr"
+          + "iption\030\001 \001(\tB*\340A\002\372A$\n\"pubsub.googleapis."
+          + "com/Subscription\022\024\n\007ack_ids\030\002 \003(\tB\003\340A\002\"\307"
+          + "\002\n\024StreamingPullRequest\022@\n\014subscription\030"
+          + "\001 \001(\tB*\340A\002\372A$\n\"pubsub.googleapis.com/Sub"
+          + "scription\022\024\n\007ack_ids\030\002 \003(\tB\003\340A\001\022$\n\027modif"
+          + "y_deadline_seconds\030\003 \003(\005B\003\340A\001\022$\n\027modify_"
+          + "deadline_ack_ids\030\004 \003(\tB\003\340A\001\022(\n\033stream_ac"
+          + "k_deadline_seconds\030\005 \001(\005B\003\340A\002\022\026\n\tclient_"
+          + "id\030\006 \001(\tB\003\340A\001\022%\n\030max_outstanding_message"
+          + "s\030\007 \001(\003B\003\340A\001\022\"\n\025max_outstanding_bytes\030\010 "
+          + "\001(\003B\003\340A\001\"\236\006\n\025StreamingPullResponse\022A\n\021re"
+          + "ceived_messages\030\001 \003(\0132!.google.pubsub.v1"
+          + ".ReceivedMessageB\003\340A\001\022f\n\030acknowledge_con"
+          + "firmation\030\005 \001(\0132?.google.pubsub.v1.Strea"
+          + "mingPullResponse.AcknowledgeConfirmation"
+          + "B\003\340A\001\022t\n modify_ack_deadline_confirmatio"
+          + "n\030\003 \001(\0132E.google.pubsub.v1.StreamingPull"
+          + "Response.ModifyAckDeadlineConfirmationB\003"
+          + "\340A\001\022d\n\027subscription_properties\030\004 \001(\0132>.g"
+          + "oogle.pubsub.v1.StreamingPullResponse.Su"
+          + "bscriptionPropertiesB\003\340A\001\032\224\001\n\027Acknowledg"
+          + "eConfirmation\022\024\n\007ack_ids\030\001 \003(\tB\003\340A\001\022\034\n\017i"
+          + "nvalid_ack_ids\030\002 \003(\tB\003\340A\001\022\036\n\021unordered_a"
+          + "ck_ids\030\003 \003(\tB\003\340A\001\022%\n\030temporary_failed_ac"
+          + "k_ids\030\004 \003(\tB\003\340A\001\032z\n\035ModifyAckDeadlineCon"
+          + "firmation\022\024\n\007ack_ids\030\001 \003(\tB\003\340A\001\022\034\n\017inval"
+          + "id_ack_ids\030\002 \003(\tB\003\340A\001\022%\n\030temporary_faile"
+          + "d_ack_ids\030\003 \003(\tB\003\340A\001\032k\n\026SubscriptionProp"
+          + "erties\022*\n\035exactly_once_delivery_enabled\030"
+          + "\001 \001(\010B\003\340A\001\022%\n\030message_ordering_enabled\030\002"
+          + " \001(\010B\003\340A\001\"\210\002\n\025CreateSnapshotRequest\0224\n\004n"
+          + "ame\030\001 \001(\tB&\340A\002\372A \n\036pubsub.googleapis.com"
+          + "/Snapshot\022@\n\014subscription\030\002 \001(\tB*\340A\002\372A$\n"
+          + "\"pubsub.googleapis.com/Subscription\022H\n\006l"
+          + "abels\030\003 \003(\01323.google.pubsub.v1.CreateSna"
+          + "pshotRequest.LabelsEntryB\003\340A\001\032-\n\013LabelsE"
+          + "ntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"\200\001\n"
+          + "\025UpdateSnapshotRequest\0221\n\010snapshot\030\001 \001(\013"
+          + "2\032.google.pubsub.v1.SnapshotB\003\340A\002\0224\n\013upd"
+          + "ate_mask\030\002 \001(\0132\032.google.protobuf.FieldMa"
+          + "skB\003\340A\002\"\326\002\n\010Snapshot\022\021\n\004name\030\001 \001(\tB\003\340A\001\022"
+          + "2\n\005topic\030\002 \001(\tB#\340A\001\372A\035\n\033pubsub.googleapi"
+          + "s.com/Topic\0224\n\013expire_time\030\003 \001(\0132\032.googl"
+          + "e.protobuf.TimestampB\003\340A\001\022;\n\006labels\030\004 \003("
+          + "\0132&.google.pubsub.v1.Snapshot.LabelsEntr"
+          + "yB\003\340A\001\032-\n\013LabelsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005va"
+          + "lue\030\002 \001(\t:\0028\001:a\352A^\n\036pubsub.googleapis.co"
+          + "m/Snapshot\022\'projects/{project}/snapshots"
+          + "/{snapshot}*\tsnapshots2\010snapshot\"N\n\022GetS"
+          + "napshotRequest\0228\n\010snapshot\030\001 \001(\tB&\340A\002\372A "
+          + "\n\036pubsub.googleapis.com/Snapshot\"\215\001\n\024Lis"
+          + "tSnapshotsRequest\022D\n\007project\030\001 \001(\tB3\340A\002\372"
+          + "A-\n+cloudresourcemanager.googleapis.com/"
+          + "Project\022\026\n\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\npage_"
+          + "token\030\003 \001(\tB\003\340A\001\"i\n\025ListSnapshotsRespons"
+          + "e\0222\n\tsnapshots\030\001 \003(\0132\032.google.pubsub.v1."
+          + "SnapshotB\003\340A\001\022\034\n\017next_page_token\030\002 \001(\tB\003"
+          + "\340A\001\"Q\n\025DeleteSnapshotRequest\0228\n\010snapshot"
           + "\030\001 \001(\tB&\340A\002\372A \n\036pubsub.googleapis.com/Sn"
-          + "apshot\"\215\001\n\024ListSnapshotsRequest\022D\n\007proje"
-          + "ct\030\001 \001(\tB3\340A\002\372A-\n+cloudresourcemanager.g"
-          + "oogleapis.com/Project\022\026\n\tpage_size\030\002 \001(\005"
-          + "B\003\340A\001\022\027\n\npage_token\030\003 \001(\tB\003\340A\001\"i\n\025ListSn"
-          + "apshotsResponse\0222\n\tsnapshots\030\001 \003(\0132\032.goo"
-          + "gle.pubsub.v1.SnapshotB\003\340A\001\022\034\n\017next_page"
-          + "_token\030\002 \001(\tB\003\340A\001\"Q\n\025DeleteSnapshotReque"
-          + "st\0228\n\010snapshot\030\001 \001(\tB&\340A\002\372A \n\036pubsub.goo"
-          + "gleapis.com/Snapshot\"\306\001\n\013SeekRequest\022@\n\014"
-          + "subscription\030\001 \001(\tB*\340A\002\372A$\n\"pubsub.googl"
-          + "eapis.com/Subscription\022/\n\004time\030\002 \001(\0132\032.g"
-          + "oogle.protobuf.TimestampB\003\340A\001H\000\022:\n\010snaps"
-          + "hot\030\003 \001(\tB&\340A\001\372A \n\036pubsub.googleapis.com"
-          + "/SnapshotH\000B\010\n\006target\"\016\n\014SeekResponse2\270\013"
-          + "\n\tPublisher\022q\n\013CreateTopic\022\027.google.pubs"
-          + "ub.v1.Topic\032\027.google.pubsub.v1.Topic\"0\332A"
-          + "\004name\202\323\344\223\002#\032\036/v1/{name=projects/*/topics"
-          + "/*}:\001*\022\221\001\n\013UpdateTopic\022$.google.pubsub.v"
-          + "1.UpdateTopicRequest\032\027.google.pubsub.v1."
-          + "Topic\"C\332A\021topic,update_mask\202\323\344\223\002)2$/v1/{"
-          + "topic.name=projects/*/topics/*}:\001*\022\223\001\n\007P"
-          + "ublish\022 .google.pubsub.v1.PublishRequest"
-          + "\032!.google.pubsub.v1.PublishResponse\"C\332A\016"
-          + "topic,messages\202\323\344\223\002,\"\'/v1/{topic=project"
-          + "s/*/topics/*}:publish:\001*\022w\n\010GetTopic\022!.g"
-          + "oogle.pubsub.v1.GetTopicRequest\032\027.google"
-          + ".pubsub.v1.Topic\"/\332A\005topic\202\323\344\223\002!\022\037/v1/{t"
-          + "opic=projects/*/topics/*}\022\212\001\n\nListTopics"
-          + "\022#.google.pubsub.v1.ListTopicsRequest\032$."
-          + "google.pubsub.v1.ListTopicsResponse\"1\332A\007"
-          + "project\202\323\344\223\002!\022\037/v1/{project=projects/*}/"
-          + "topics\022\272\001\n\026ListTopicSubscriptions\022/.goog"
-          + "le.pubsub.v1.ListTopicSubscriptionsReque"
-          + "st\0320.google.pubsub.v1.ListTopicSubscript"
-          + "ionsResponse\"=\332A\005topic\202\323\344\223\002/\022-/v1/{topic"
-          + "=projects/*/topics/*}/subscriptions\022\252\001\n\022"
-          + "ListTopicSnapshots\022+.google.pubsub.v1.Li"
-          + "stTopicSnapshotsRequest\032,.google.pubsub."
-          + "v1.ListTopicSnapshotsResponse\"9\332A\005topic\202"
-          + "\323\344\223\002+\022)/v1/{topic=projects/*/topics/*}/s"
-          + "napshots\022|\n\013DeleteTopic\022$.google.pubsub."
-          + "v1.DeleteTopicRequest\032\026.google.protobuf."
-          + "Empty\"/\332A\005topic\202\323\344\223\002!*\037/v1/{topic=projec"
-          + "ts/*/topics/*}\022\255\001\n\022DetachSubscription\022+."
-          + "google.pubsub.v1.DetachSubscriptionReque",
-      "st\032,.google.pubsub.v1.DetachSubscription"
-          + "Response\"<\202\323\344\223\0026\"4/v1/{subscription=proj"
-          + "ects/*/subscriptions/*}:detach\032p\312A\025pubsu"
-          + "b.googleapis.com\322AUhttps://www.googleapi"
-          + "s.com/auth/cloud-platform,https://www.go"
-          + "ogleapis.com/auth/pubsub2\322\025\n\nSubscriber\022"
-          + "\264\001\n\022CreateSubscription\022\036.google.pubsub.v"
-          + "1.Subscription\032\036.google.pubsub.v1.Subscr"
-          + "iption\"^\332A+name,topic,push_config,ack_de"
-          + "adline_seconds\202\323\344\223\002*\032%/v1/{name=projects"
-          + "/*/subscriptions/*}:\001*\022\241\001\n\017GetSubscripti"
-          + "on\022(.google.pubsub.v1.GetSubscriptionReq"
-          + "uest\032\036.google.pubsub.v1.Subscription\"D\332A"
-          + "\014subscription\202\323\344\223\002/\022-/v1/{subscription=p"
-          + "rojects/*/subscriptions/*}\022\273\001\n\022UpdateSub"
-          + "scription\022+.google.pubsub.v1.UpdateSubsc"
-          + "riptionRequest\032\036.google.pubsub.v1.Subscr"
-          + "iption\"X\332A\030subscription,update_mask\202\323\344\223\002"
-          + "722/v1/{subscription.name=projects/*/sub"
-          + "scriptions/*}:\001*\022\246\001\n\021ListSubscriptions\022*"
-          + ".google.pubsub.v1.ListSubscriptionsReque"
-          + "st\032+.google.pubsub.v1.ListSubscriptionsR"
-          + "esponse\"8\332A\007project\202\323\344\223\002(\022&/v1/{project="
-          + "projects/*}/subscriptions\022\237\001\n\022DeleteSubs"
-          + "cription\022+.google.pubsub.v1.DeleteSubscr"
-          + "iptionRequest\032\026.google.protobuf.Empty\"D\332"
-          + "A\014subscription\202\323\344\223\002/*-/v1/{subscription="
-          + "projects/*/subscriptions/*}\022\317\001\n\021ModifyAc"
-          + "kDeadline\022*.google.pubsub.v1.ModifyAckDe"
-          + "adlineRequest\032\026.google.protobuf.Empty\"v\332"
-          + "A)subscription,ack_ids,ack_deadline_seco"
-          + "nds\202\323\344\223\002D\"?/v1/{subscription=projects/*/"
-          + "subscriptions/*}:modifyAckDeadline:\001*\022\250\001"
-          + "\n\013Acknowledge\022$.google.pubsub.v1.Acknowl"
-          + "edgeRequest\032\026.google.protobuf.Empty\"[\332A\024"
-          + "subscription,ack_ids\202\323\344\223\002>\"9/v1/{subscri"
-          + "ption=projects/*/subscriptions/*}:acknow"
-          + "ledge:\001*\022\320\001\n\004Pull\022\035.google.pubsub.v1.Pul"
-          + "lRequest\032\036.google.pubsub.v1.PullResponse"
-          + "\"\210\001\332A,subscription,return_immediately,ma"
-          + "x_messages\332A\031subscription,max_messages\202\323"
-          + "\344\223\0027\"2/v1/{subscription=projects/*/subsc"
-          + "riptions/*}:pull:\001*\022f\n\rStreamingPull\022&.g"
-          + "oogle.pubsub.v1.StreamingPullRequest\032\'.g"
-          + "oogle.pubsub.v1.StreamingPullResponse\"\000("
-          + "\0010\001\022\273\001\n\020ModifyPushConfig\022).google.pubsub"
-          + ".v1.ModifyPushConfigRequest\032\026.google.pro"
-          + "tobuf.Empty\"d\332A\030subscription,push_config"
-          + "\202\323\344\223\002C\">/v1/{subscription=projects/*/sub"
-          + "scriptions/*}:modifyPushConfig:\001*\022\211\001\n\013Ge"
-          + "tSnapshot\022$.google.pubsub.v1.GetSnapshot"
-          + "Request\032\032.google.pubsub.v1.Snapshot\"8\332A\010"
-          + "snapshot\202\323\344\223\002\'\022%/v1/{snapshot=projects/*"
-          + "/snapshots/*}\022\226\001\n\rListSnapshots\022&.google"
-          + ".pubsub.v1.ListSnapshotsRequest\032\'.google"
-          + ".pubsub.v1.ListSnapshotsResponse\"4\332A\007pro"
-          + "ject\202\323\344\223\002$\022\"/v1/{project=projects/*}/sna"
-          + "pshots\022\227\001\n\016CreateSnapshot\022\'.google.pubsu"
-          + "b.v1.CreateSnapshotRequest\032\032.google.pubs"
-          + "ub.v1.Snapshot\"@\332A\021name,subscription\202\323\344\223"
-          + "\002&\032!/v1/{name=projects/*/snapshots/*}:\001*"
-          + "\022\243\001\n\016UpdateSnapshot\022\'.google.pubsub.v1.U"
-          + "pdateSnapshotRequest\032\032.google.pubsub.v1."
-          + "Snapshot\"L\332A\024snapshot,update_mask\202\323\344\223\002/2"
-          + "*/v1/{snapshot.name=projects/*/snapshots"
-          + "/*}:\001*\022\213\001\n\016DeleteSnapshot\022\'.google.pubsu"
-          + "b.v1.DeleteSnapshotRequest\032\026.google.prot"
-          + "obuf.Empty\"8\332A\010snapshot\202\323\344\223\002\'*%/v1/{snap"
-          + "shot=projects/*/snapshots/*}\022\204\001\n\004Seek\022\035."
-          + "google.pubsub.v1.SeekRequest\032\036.google.pu"
-          + "bsub.v1.SeekResponse\"=\202\323\344\223\0027\"2/v1/{subsc"
-          + "ription=projects/*/subscriptions/*}:seek"
-          + ":\001*\032p\312A\025pubsub.googleapis.com\322AUhttps://"
-          + "www.googleapis.com/auth/cloud-platform,h"
-          + "ttps://www.googleapis.com/auth/pubsubB\252\001"
-          + "\n\024com.google.pubsub.v1B\013PubsubProtoP\001Z2c"
-          + "loud.google.com/go/pubsub/apiv1/pubsubpb"
-          + ";pubsubpb\370\001\001\252\002\026Google.Cloud.PubSub.V1\312\002\026"
-          + "Google\\Cloud\\PubSub\\V1\352\002\031Google::Cloud::"
-          + "PubSub::V1b\006proto3"
+          + "apshot\"\306\001\n\013SeekRequest\022@\n\014subscription\030\001"
+          + " \001(\tB*\340A\002\372A$\n\"pubsub.googleapis.com/Subs"
+          + "cription\022/\n\004time\030\002 \001(\0132\032.google.protobuf"
+          + ".TimestampB\003\340A\001H\000\022:\n\010snapshot\030\003 \001(\tB&\340A\001"
+          + "\372A \n\036pubsub.googleapis.com/SnapshotH\000B\010\n"
+          + "\006target\"\016\n\014SeekResponse2\270\013\n\tPublisher\022q\n"
+          + "\013CreateTopic\022\027.google.pubsub.v1.Topic\032\027."
+          + "google.pubsub.v1.Topic\"0\332A\004name\202\323\344\223\002#\032\036/"
+          + "v1/{name=projects/*/topics/*}:\001*\022\221\001\n\013Upd"
+          + "ateTopic\022$.google.pubsub.v1.UpdateTopicR"
+          + "equest\032\027.google.pubsub.v1.Topic\"C\332A\021topi"
+          + "c,update_mask\202\323\344\223\002)2$/v1/{topic.name=pro"
+          + "jects/*/topics/*}:\001*\022\223\001\n\007Publish\022 .googl"
+          + "e.pubsub.v1.PublishRequest\032!.google.pubs"
+          + "ub.v1.PublishResponse\"C\332A\016topic,messages"
+          + "\202\323\344\223\002,\"\'/v1/{topic=projects/*/topics/*}:"
+          + "publish:\001*\022w\n\010GetTopic\022!.google.pubsub.v"
+          + "1.GetTopicRequest\032\027.google.pubsub.v1.Top"
+          + "ic\"/\332A\005topic\202\323\344\223\002!\022\037/v1/{topic=projects/"
+          + "*/topics/*}\022\212\001\n\nListTopics\022#.google.pubs"
+          + "ub.v1.ListTopicsRequest\032$.google.pubsub."
+          + "v1.ListTopicsResponse\"1\332A\007project\202\323\344\223\002!\022"
+          + "\037/v1/{project=projects/*}/topics\022\272\001\n\026Lis"
+          + "tTopicSubscriptions\022/.google.pubsub.v1.L"
+          + "istTopicSubscriptionsRequest\0320.google.pu"
+          + "bsub.v1.ListTopicSubscriptionsResponse\"="
+          + "\332A\005topic\202\323\344\223\002/\022-/v1/{topic=projects/*/to",
+      "pics/*}/subscriptions\022\252\001\n\022ListTopicSnaps"
+          + "hots\022+.google.pubsub.v1.ListTopicSnapsho"
+          + "tsRequest\032,.google.pubsub.v1.ListTopicSn"
+          + "apshotsResponse\"9\332A\005topic\202\323\344\223\002+\022)/v1/{to"
+          + "pic=projects/*/topics/*}/snapshots\022|\n\013De"
+          + "leteTopic\022$.google.pubsub.v1.DeleteTopic"
+          + "Request\032\026.google.protobuf.Empty\"/\332A\005topi"
+          + "c\202\323\344\223\002!*\037/v1/{topic=projects/*/topics/*}"
+          + "\022\255\001\n\022DetachSubscription\022+.google.pubsub."
+          + "v1.DetachSubscriptionRequest\032,.google.pu"
+          + "bsub.v1.DetachSubscriptionResponse\"<\202\323\344\223"
+          + "\0026\"4/v1/{subscription=projects/*/subscri"
+          + "ptions/*}:detach\032p\312A\025pubsub.googleapis.c"
+          + "om\322AUhttps://www.googleapis.com/auth/clo"
+          + "ud-platform,https://www.googleapis.com/a"
+          + "uth/pubsub2\322\025\n\nSubscriber\022\264\001\n\022CreateSubs"
+          + "cription\022\036.google.pubsub.v1.Subscription"
+          + "\032\036.google.pubsub.v1.Subscription\"^\332A+nam"
+          + "e,topic,push_config,ack_deadline_seconds"
+          + "\202\323\344\223\002*\032%/v1/{name=projects/*/subscriptio"
+          + "ns/*}:\001*\022\241\001\n\017GetSubscription\022(.google.pu"
+          + "bsub.v1.GetSubscriptionRequest\032\036.google."
+          + "pubsub.v1.Subscription\"D\332A\014subscription\202"
+          + "\323\344\223\002/\022-/v1/{subscription=projects/*/subs"
+          + "criptions/*}\022\273\001\n\022UpdateSubscription\022+.go"
+          + "ogle.pubsub.v1.UpdateSubscriptionRequest"
+          + "\032\036.google.pubsub.v1.Subscription\"X\332A\030sub"
+          + "scription,update_mask\202\323\344\223\002722/v1/{subscr"
+          + "iption.name=projects/*/subscriptions/*}:"
+          + "\001*\022\246\001\n\021ListSubscriptions\022*.google.pubsub"
+          + ".v1.ListSubscriptionsRequest\032+.google.pu"
+          + "bsub.v1.ListSubscriptionsResponse\"8\332A\007pr"
+          + "oject\202\323\344\223\002(\022&/v1/{project=projects/*}/su"
+          + "bscriptions\022\237\001\n\022DeleteSubscription\022+.goo"
+          + "gle.pubsub.v1.DeleteSubscriptionRequest\032"
+          + "\026.google.protobuf.Empty\"D\332A\014subscription"
+          + "\202\323\344\223\002/*-/v1/{subscription=projects/*/sub"
+          + "scriptions/*}\022\317\001\n\021ModifyAckDeadline\022*.go"
+          + "ogle.pubsub.v1.ModifyAckDeadlineRequest\032"
+          + "\026.google.protobuf.Empty\"v\332A)subscription"
+          + ",ack_ids,ack_deadline_seconds\202\323\344\223\002D\"?/v1"
+          + "/{subscription=projects/*/subscriptions/"
+          + "*}:modifyAckDeadline:\001*\022\250\001\n\013Acknowledge\022"
+          + "$.google.pubsub.v1.AcknowledgeRequest\032\026."
+          + "google.protobuf.Empty\"[\332A\024subscription,a"
+          + "ck_ids\202\323\344\223\002>\"9/v1/{subscription=projects"
+          + "/*/subscriptions/*}:acknowledge:\001*\022\320\001\n\004P"
+          + "ull\022\035.google.pubsub.v1.PullRequest\032\036.goo"
+          + "gle.pubsub.v1.PullResponse\"\210\001\332A,subscrip"
+          + "tion,return_immediately,max_messages\332A\031s"
+          + "ubscription,max_messages\202\323\344\223\0027\"2/v1/{sub"
+          + "scription=projects/*/subscriptions/*}:pu"
+          + "ll:\001*\022f\n\rStreamingPull\022&.google.pubsub.v"
+          + "1.StreamingPullRequest\032\'.google.pubsub.v"
+          + "1.StreamingPullResponse\"\000(\0010\001\022\273\001\n\020Modify"
+          + "PushConfig\022).google.pubsub.v1.ModifyPush"
+          + "ConfigRequest\032\026.google.protobuf.Empty\"d\332"
+          + "A\030subscription,push_config\202\323\344\223\002C\">/v1/{s"
+          + "ubscription=projects/*/subscriptions/*}:"
+          + "modifyPushConfig:\001*\022\211\001\n\013GetSnapshot\022$.go"
+          + "ogle.pubsub.v1.GetSnapshotRequest\032\032.goog"
+          + "le.pubsub.v1.Snapshot\"8\332A\010snapshot\202\323\344\223\002\'"
+          + "\022%/v1/{snapshot=projects/*/snapshots/*}\022"
+          + "\226\001\n\rListSnapshots\022&.google.pubsub.v1.Lis"
+          + "tSnapshotsRequest\032\'.google.pubsub.v1.Lis"
+          + "tSnapshotsResponse\"4\332A\007project\202\323\344\223\002$\022\"/v"
+          + "1/{project=projects/*}/snapshots\022\227\001\n\016Cre"
+          + "ateSnapshot\022\'.google.pubsub.v1.CreateSna"
+          + "pshotRequest\032\032.google.pubsub.v1.Snapshot"
+          + "\"@\332A\021name,subscription\202\323\344\223\002&\032!/v1/{name="
+          + "projects/*/snapshots/*}:\001*\022\243\001\n\016UpdateSna"
+          + "pshot\022\'.google.pubsub.v1.UpdateSnapshotR"
+          + "equest\032\032.google.pubsub.v1.Snapshot\"L\332A\024s"
+          + "napshot,update_mask\202\323\344\223\002/2*/v1/{snapshot"
+          + ".name=projects/*/snapshots/*}:\001*\022\213\001\n\016Del"
+          + "eteSnapshot\022\'.google.pubsub.v1.DeleteSna"
+          + "pshotRequest\032\026.google.protobuf.Empty\"8\332A"
+          + "\010snapshot\202\323\344\223\002\'*%/v1/{snapshot=projects/"
+          + "*/snapshots/*}\022\204\001\n\004Seek\022\035.google.pubsub."
+          + "v1.SeekRequest\032\036.google.pubsub.v1.SeekRe"
+          + "sponse\"=\202\323\344\223\0027\"2/v1/{subscription=projec"
+          + "ts/*/subscriptions/*}:seek:\001*\032p\312A\025pubsub"
+          + ".googleapis.com\322AUhttps://www.googleapis"
+          + ".com/auth/cloud-platform,https://www.goo"
+          + "gleapis.com/auth/pubsubB\247\001\n\024com.google.p"
+          + "ubsub.v1B\013PubsubProtoP\001Z2cloud.google.co"
+          + "m/go/pubsub/apiv1/pubsubpb;pubsubpb\252\002\026Go"
+          + "ogle.Cloud.PubSub.V1\312\002\026Google\\Cloud\\PubS"
+          + "ub\\V1\352\002\031Google::Cloud::PubSub::V1b\006proto"
+          + "3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
@@ -1040,7 +1058,23 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
             new java.lang.String[] {
               "ClusterId", "KafkaTopic", "PartitionId", "Offset", "ApiViolationReason", "Reason",
             });
-    internal_static_google_pubsub_v1_Topic_descriptor = getDescriptor().getMessageTypes().get(5);
+    internal_static_google_pubsub_v1_JavaScriptUDF_descriptor =
+        getDescriptor().getMessageTypes().get(5);
+    internal_static_google_pubsub_v1_JavaScriptUDF_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_pubsub_v1_JavaScriptUDF_descriptor,
+            new java.lang.String[] {
+              "FunctionName", "Code",
+            });
+    internal_static_google_pubsub_v1_MessageTransform_descriptor =
+        getDescriptor().getMessageTypes().get(6);
+    internal_static_google_pubsub_v1_MessageTransform_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+            internal_static_google_pubsub_v1_MessageTransform_descriptor,
+            new java.lang.String[] {
+              "JavascriptUdf", "Enabled", "Transform",
+            });
+    internal_static_google_pubsub_v1_Topic_descriptor = getDescriptor().getMessageTypes().get(7);
     internal_static_google_pubsub_v1_Topic_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_Topic_descriptor,
@@ -1054,6 +1088,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "MessageRetentionDuration",
               "State",
               "IngestionDataSourceSettings",
+              "MessageTransforms",
             });
     internal_static_google_pubsub_v1_Topic_LabelsEntry_descriptor =
         internal_static_google_pubsub_v1_Topic_descriptor.getNestedTypes().get(0);
@@ -1064,7 +1099,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Key", "Value",
             });
     internal_static_google_pubsub_v1_PubsubMessage_descriptor =
-        getDescriptor().getMessageTypes().get(6);
+        getDescriptor().getMessageTypes().get(8);
     internal_static_google_pubsub_v1_PubsubMessage_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_PubsubMessage_descriptor,
@@ -1080,7 +1115,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Key", "Value",
             });
     internal_static_google_pubsub_v1_GetTopicRequest_descriptor =
-        getDescriptor().getMessageTypes().get(7);
+        getDescriptor().getMessageTypes().get(9);
     internal_static_google_pubsub_v1_GetTopicRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_GetTopicRequest_descriptor,
@@ -1088,7 +1123,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Topic",
             });
     internal_static_google_pubsub_v1_UpdateTopicRequest_descriptor =
-        getDescriptor().getMessageTypes().get(8);
+        getDescriptor().getMessageTypes().get(10);
     internal_static_google_pubsub_v1_UpdateTopicRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_UpdateTopicRequest_descriptor,
@@ -1096,7 +1131,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Topic", "UpdateMask",
             });
     internal_static_google_pubsub_v1_PublishRequest_descriptor =
-        getDescriptor().getMessageTypes().get(9);
+        getDescriptor().getMessageTypes().get(11);
     internal_static_google_pubsub_v1_PublishRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_PublishRequest_descriptor,
@@ -1104,7 +1139,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Topic", "Messages",
             });
     internal_static_google_pubsub_v1_PublishResponse_descriptor =
-        getDescriptor().getMessageTypes().get(10);
+        getDescriptor().getMessageTypes().get(12);
     internal_static_google_pubsub_v1_PublishResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_PublishResponse_descriptor,
@@ -1112,7 +1147,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "MessageIds",
             });
     internal_static_google_pubsub_v1_ListTopicsRequest_descriptor =
-        getDescriptor().getMessageTypes().get(11);
+        getDescriptor().getMessageTypes().get(13);
     internal_static_google_pubsub_v1_ListTopicsRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListTopicsRequest_descriptor,
@@ -1120,7 +1155,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Project", "PageSize", "PageToken",
             });
     internal_static_google_pubsub_v1_ListTopicsResponse_descriptor =
-        getDescriptor().getMessageTypes().get(12);
+        getDescriptor().getMessageTypes().get(14);
     internal_static_google_pubsub_v1_ListTopicsResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListTopicsResponse_descriptor,
@@ -1128,7 +1163,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Topics", "NextPageToken",
             });
     internal_static_google_pubsub_v1_ListTopicSubscriptionsRequest_descriptor =
-        getDescriptor().getMessageTypes().get(13);
+        getDescriptor().getMessageTypes().get(15);
     internal_static_google_pubsub_v1_ListTopicSubscriptionsRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListTopicSubscriptionsRequest_descriptor,
@@ -1136,7 +1171,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Topic", "PageSize", "PageToken",
             });
     internal_static_google_pubsub_v1_ListTopicSubscriptionsResponse_descriptor =
-        getDescriptor().getMessageTypes().get(14);
+        getDescriptor().getMessageTypes().get(16);
     internal_static_google_pubsub_v1_ListTopicSubscriptionsResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListTopicSubscriptionsResponse_descriptor,
@@ -1144,7 +1179,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscriptions", "NextPageToken",
             });
     internal_static_google_pubsub_v1_ListTopicSnapshotsRequest_descriptor =
-        getDescriptor().getMessageTypes().get(15);
+        getDescriptor().getMessageTypes().get(17);
     internal_static_google_pubsub_v1_ListTopicSnapshotsRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListTopicSnapshotsRequest_descriptor,
@@ -1152,7 +1187,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Topic", "PageSize", "PageToken",
             });
     internal_static_google_pubsub_v1_ListTopicSnapshotsResponse_descriptor =
-        getDescriptor().getMessageTypes().get(16);
+        getDescriptor().getMessageTypes().get(18);
     internal_static_google_pubsub_v1_ListTopicSnapshotsResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListTopicSnapshotsResponse_descriptor,
@@ -1160,7 +1195,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Snapshots", "NextPageToken",
             });
     internal_static_google_pubsub_v1_DeleteTopicRequest_descriptor =
-        getDescriptor().getMessageTypes().get(17);
+        getDescriptor().getMessageTypes().get(19);
     internal_static_google_pubsub_v1_DeleteTopicRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_DeleteTopicRequest_descriptor,
@@ -1168,7 +1203,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Topic",
             });
     internal_static_google_pubsub_v1_DetachSubscriptionRequest_descriptor =
-        getDescriptor().getMessageTypes().get(18);
+        getDescriptor().getMessageTypes().get(20);
     internal_static_google_pubsub_v1_DetachSubscriptionRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_DetachSubscriptionRequest_descriptor,
@@ -1176,13 +1211,13 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription",
             });
     internal_static_google_pubsub_v1_DetachSubscriptionResponse_descriptor =
-        getDescriptor().getMessageTypes().get(19);
+        getDescriptor().getMessageTypes().get(21);
     internal_static_google_pubsub_v1_DetachSubscriptionResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_DetachSubscriptionResponse_descriptor,
             new java.lang.String[] {});
     internal_static_google_pubsub_v1_Subscription_descriptor =
-        getDescriptor().getMessageTypes().get(20);
+        getDescriptor().getMessageTypes().get(22);
     internal_static_google_pubsub_v1_Subscription_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_Subscription_descriptor,
@@ -1206,6 +1241,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "TopicMessageRetentionDuration",
               "State",
               "AnalyticsHubSubscriptionInfo",
+              "MessageTransforms",
             });
     internal_static_google_pubsub_v1_Subscription_AnalyticsHubSubscriptionInfo_descriptor =
         internal_static_google_pubsub_v1_Subscription_descriptor.getNestedTypes().get(0);
@@ -1224,7 +1260,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Key", "Value",
             });
     internal_static_google_pubsub_v1_RetryPolicy_descriptor =
-        getDescriptor().getMessageTypes().get(21);
+        getDescriptor().getMessageTypes().get(23);
     internal_static_google_pubsub_v1_RetryPolicy_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_RetryPolicy_descriptor,
@@ -1232,7 +1268,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "MinimumBackoff", "MaximumBackoff",
             });
     internal_static_google_pubsub_v1_DeadLetterPolicy_descriptor =
-        getDescriptor().getMessageTypes().get(22);
+        getDescriptor().getMessageTypes().get(24);
     internal_static_google_pubsub_v1_DeadLetterPolicy_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_DeadLetterPolicy_descriptor,
@@ -1240,7 +1276,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "DeadLetterTopic", "MaxDeliveryAttempts",
             });
     internal_static_google_pubsub_v1_ExpirationPolicy_descriptor =
-        getDescriptor().getMessageTypes().get(23);
+        getDescriptor().getMessageTypes().get(25);
     internal_static_google_pubsub_v1_ExpirationPolicy_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ExpirationPolicy_descriptor,
@@ -1248,7 +1284,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Ttl",
             });
     internal_static_google_pubsub_v1_PushConfig_descriptor =
-        getDescriptor().getMessageTypes().get(24);
+        getDescriptor().getMessageTypes().get(26);
     internal_static_google_pubsub_v1_PushConfig_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_PushConfig_descriptor,
@@ -1292,7 +1328,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Key", "Value",
             });
     internal_static_google_pubsub_v1_BigQueryConfig_descriptor =
-        getDescriptor().getMessageTypes().get(25);
+        getDescriptor().getMessageTypes().get(27);
     internal_static_google_pubsub_v1_BigQueryConfig_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_BigQueryConfig_descriptor,
@@ -1306,7 +1342,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "ServiceAccountEmail",
             });
     internal_static_google_pubsub_v1_CloudStorageConfig_descriptor =
-        getDescriptor().getMessageTypes().get(26);
+        getDescriptor().getMessageTypes().get(28);
     internal_static_google_pubsub_v1_CloudStorageConfig_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_CloudStorageConfig_descriptor,
@@ -1339,7 +1375,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "WriteMetadata", "UseTopicSchema",
             });
     internal_static_google_pubsub_v1_ReceivedMessage_descriptor =
-        getDescriptor().getMessageTypes().get(27);
+        getDescriptor().getMessageTypes().get(29);
     internal_static_google_pubsub_v1_ReceivedMessage_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ReceivedMessage_descriptor,
@@ -1347,7 +1383,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "AckId", "Message", "DeliveryAttempt",
             });
     internal_static_google_pubsub_v1_GetSubscriptionRequest_descriptor =
-        getDescriptor().getMessageTypes().get(28);
+        getDescriptor().getMessageTypes().get(30);
     internal_static_google_pubsub_v1_GetSubscriptionRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_GetSubscriptionRequest_descriptor,
@@ -1355,7 +1391,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription",
             });
     internal_static_google_pubsub_v1_UpdateSubscriptionRequest_descriptor =
-        getDescriptor().getMessageTypes().get(29);
+        getDescriptor().getMessageTypes().get(31);
     internal_static_google_pubsub_v1_UpdateSubscriptionRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_UpdateSubscriptionRequest_descriptor,
@@ -1363,7 +1399,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription", "UpdateMask",
             });
     internal_static_google_pubsub_v1_ListSubscriptionsRequest_descriptor =
-        getDescriptor().getMessageTypes().get(30);
+        getDescriptor().getMessageTypes().get(32);
     internal_static_google_pubsub_v1_ListSubscriptionsRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListSubscriptionsRequest_descriptor,
@@ -1371,7 +1407,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Project", "PageSize", "PageToken",
             });
     internal_static_google_pubsub_v1_ListSubscriptionsResponse_descriptor =
-        getDescriptor().getMessageTypes().get(31);
+        getDescriptor().getMessageTypes().get(33);
     internal_static_google_pubsub_v1_ListSubscriptionsResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListSubscriptionsResponse_descriptor,
@@ -1379,7 +1415,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscriptions", "NextPageToken",
             });
     internal_static_google_pubsub_v1_DeleteSubscriptionRequest_descriptor =
-        getDescriptor().getMessageTypes().get(32);
+        getDescriptor().getMessageTypes().get(34);
     internal_static_google_pubsub_v1_DeleteSubscriptionRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_DeleteSubscriptionRequest_descriptor,
@@ -1387,7 +1423,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription",
             });
     internal_static_google_pubsub_v1_ModifyPushConfigRequest_descriptor =
-        getDescriptor().getMessageTypes().get(33);
+        getDescriptor().getMessageTypes().get(35);
     internal_static_google_pubsub_v1_ModifyPushConfigRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ModifyPushConfigRequest_descriptor,
@@ -1395,7 +1431,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription", "PushConfig",
             });
     internal_static_google_pubsub_v1_PullRequest_descriptor =
-        getDescriptor().getMessageTypes().get(34);
+        getDescriptor().getMessageTypes().get(36);
     internal_static_google_pubsub_v1_PullRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_PullRequest_descriptor,
@@ -1403,7 +1439,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription", "ReturnImmediately", "MaxMessages",
             });
     internal_static_google_pubsub_v1_PullResponse_descriptor =
-        getDescriptor().getMessageTypes().get(35);
+        getDescriptor().getMessageTypes().get(37);
     internal_static_google_pubsub_v1_PullResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_PullResponse_descriptor,
@@ -1411,7 +1447,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "ReceivedMessages",
             });
     internal_static_google_pubsub_v1_ModifyAckDeadlineRequest_descriptor =
-        getDescriptor().getMessageTypes().get(36);
+        getDescriptor().getMessageTypes().get(38);
     internal_static_google_pubsub_v1_ModifyAckDeadlineRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ModifyAckDeadlineRequest_descriptor,
@@ -1419,7 +1455,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription", "AckIds", "AckDeadlineSeconds",
             });
     internal_static_google_pubsub_v1_AcknowledgeRequest_descriptor =
-        getDescriptor().getMessageTypes().get(37);
+        getDescriptor().getMessageTypes().get(39);
     internal_static_google_pubsub_v1_AcknowledgeRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_AcknowledgeRequest_descriptor,
@@ -1427,7 +1463,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription", "AckIds",
             });
     internal_static_google_pubsub_v1_StreamingPullRequest_descriptor =
-        getDescriptor().getMessageTypes().get(38);
+        getDescriptor().getMessageTypes().get(40);
     internal_static_google_pubsub_v1_StreamingPullRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_StreamingPullRequest_descriptor,
@@ -1442,7 +1478,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "MaxOutstandingBytes",
             });
     internal_static_google_pubsub_v1_StreamingPullResponse_descriptor =
-        getDescriptor().getMessageTypes().get(39);
+        getDescriptor().getMessageTypes().get(41);
     internal_static_google_pubsub_v1_StreamingPullResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_StreamingPullResponse_descriptor,
@@ -1477,7 +1513,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "ExactlyOnceDeliveryEnabled", "MessageOrderingEnabled",
             });
     internal_static_google_pubsub_v1_CreateSnapshotRequest_descriptor =
-        getDescriptor().getMessageTypes().get(40);
+        getDescriptor().getMessageTypes().get(42);
     internal_static_google_pubsub_v1_CreateSnapshotRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_CreateSnapshotRequest_descriptor,
@@ -1493,7 +1529,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Key", "Value",
             });
     internal_static_google_pubsub_v1_UpdateSnapshotRequest_descriptor =
-        getDescriptor().getMessageTypes().get(41);
+        getDescriptor().getMessageTypes().get(43);
     internal_static_google_pubsub_v1_UpdateSnapshotRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_UpdateSnapshotRequest_descriptor,
@@ -1501,7 +1537,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Snapshot", "UpdateMask",
             });
     internal_static_google_pubsub_v1_Snapshot_descriptor =
-        getDescriptor().getMessageTypes().get(42);
+        getDescriptor().getMessageTypes().get(44);
     internal_static_google_pubsub_v1_Snapshot_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_Snapshot_descriptor,
@@ -1517,7 +1553,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Key", "Value",
             });
     internal_static_google_pubsub_v1_GetSnapshotRequest_descriptor =
-        getDescriptor().getMessageTypes().get(43);
+        getDescriptor().getMessageTypes().get(45);
     internal_static_google_pubsub_v1_GetSnapshotRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_GetSnapshotRequest_descriptor,
@@ -1525,7 +1561,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Snapshot",
             });
     internal_static_google_pubsub_v1_ListSnapshotsRequest_descriptor =
-        getDescriptor().getMessageTypes().get(44);
+        getDescriptor().getMessageTypes().get(46);
     internal_static_google_pubsub_v1_ListSnapshotsRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListSnapshotsRequest_descriptor,
@@ -1533,7 +1569,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Project", "PageSize", "PageToken",
             });
     internal_static_google_pubsub_v1_ListSnapshotsResponse_descriptor =
-        getDescriptor().getMessageTypes().get(45);
+        getDescriptor().getMessageTypes().get(47);
     internal_static_google_pubsub_v1_ListSnapshotsResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_ListSnapshotsResponse_descriptor,
@@ -1541,7 +1577,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Snapshots", "NextPageToken",
             });
     internal_static_google_pubsub_v1_DeleteSnapshotRequest_descriptor =
-        getDescriptor().getMessageTypes().get(46);
+        getDescriptor().getMessageTypes().get(48);
     internal_static_google_pubsub_v1_DeleteSnapshotRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_DeleteSnapshotRequest_descriptor,
@@ -1549,7 +1585,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Snapshot",
             });
     internal_static_google_pubsub_v1_SeekRequest_descriptor =
-        getDescriptor().getMessageTypes().get(47);
+        getDescriptor().getMessageTypes().get(49);
     internal_static_google_pubsub_v1_SeekRequest_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_SeekRequest_descriptor,
@@ -1557,7 +1593,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "Subscription", "Time", "Snapshot", "Target",
             });
     internal_static_google_pubsub_v1_SeekResponse_descriptor =
-        getDescriptor().getMessageTypes().get(48);
+        getDescriptor().getMessageTypes().get(50);
     internal_static_google_pubsub_v1_SeekResponse_fieldAccessorTable =
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_pubsub_v1_SeekResponse_descriptor, new java.lang.String[] {});
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequest.java
index 0fcf1b660..7345e9613 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequest.java
@@ -137,7 +137,7 @@ public com.google.protobuf.ByteString getSubscriptionBytes() {
    * </code>
    *
    * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-   *     google/pubsub/v1/pubsub.proto;l=1840
+   *     google/pubsub/v1/pubsub.proto;l=1907
    * @return The returnImmediately.
    */
   @java.lang.Override
@@ -688,7 +688,7 @@ public Builder setSubscriptionBytes(com.google.protobuf.ByteString value) {
      * </code>
      *
      * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-     *     google/pubsub/v1/pubsub.proto;l=1840
+     *     google/pubsub/v1/pubsub.proto;l=1907
      * @return The returnImmediately.
      */
     @java.lang.Override
@@ -714,7 +714,7 @@ public boolean getReturnImmediately() {
      * </code>
      *
      * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-     *     google/pubsub/v1/pubsub.proto;l=1840
+     *     google/pubsub/v1/pubsub.proto;l=1907
      * @param value The returnImmediately to set.
      * @return This builder for chaining.
      */
@@ -744,7 +744,7 @@ public Builder setReturnImmediately(boolean value) {
      * </code>
      *
      * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-     *     google/pubsub/v1/pubsub.proto;l=1840
+     *     google/pubsub/v1/pubsub.proto;l=1907
      * @return This builder for chaining.
      */
     @java.lang.Deprecated
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequestOrBuilder.java
index 6520bf9bd..0d99d58e5 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequestOrBuilder.java
@@ -72,7 +72,7 @@ public interface PullRequestOrBuilder
    * </code>
    *
    * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-   *     google/pubsub/v1/pubsub.proto;l=1840
+   *     google/pubsub/v1/pubsub.proto;l=1907
    * @return The returnImmediately.
    */
   @java.lang.Deprecated
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SchemaProto.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SchemaProto.java
index debada97a..27f4675b1 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SchemaProto.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SchemaProto.java
@@ -197,11 +197,11 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "alidateMessage:\001*\032p\312A\025pubsub.googleapis."
           + "com\322AUhttps://www.googleapis.com/auth/cl"
           + "oud-platform,https://www.googleapis.com/"
-          + "auth/pubsubB\252\001\n\024com.google.pubsub.v1B\013Sc"
+          + "auth/pubsubB\247\001\n\024com.google.pubsub.v1B\013Sc"
           + "hemaProtoP\001Z2cloud.google.com/go/pubsub/"
-          + "apiv1/pubsubpb;pubsubpb\370\001\001\252\002\026Google.Clou"
-          + "d.PubSub.V1\312\002\026Google\\Cloud\\PubSub\\V1\352\002\031G"
-          + "oogle::Cloud::PubSub::V1b\006proto3"
+          + "apiv1/pubsubpb;pubsubpb\252\002\026Google.Cloud.P"
+          + "ubSub.V1\312\002\026Google\\Cloud\\PubSub\\V1\352\002\031Goog"
+          + "le::Cloud::PubSub::V1b\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Subscription.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Subscription.java
index 423ae5a49..31581f253 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Subscription.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Subscription.java
@@ -45,6 +45,7 @@ private Subscription() {
     topic_ = "";
     filter_ = "";
     state_ = 0;
+    messageTransforms_ = java.util.Collections.emptyList();
   }
 
   @java.lang.Override
@@ -308,8 +309,8 @@ public interface AnalyticsHubSubscriptionInfoOrBuilder
    *
    *
    * <pre>
-   * Information about an associated Analytics Hub subscription
-   * (https://cloud.google.com/bigquery/docs/analytics-hub-manage-subscriptions).
+   * Information about an associated [Analytics Hub
+   * subscription](https://cloud.google.com/bigquery/docs/analytics-hub-manage-subscriptions).
    * </pre>
    *
    * Protobuf type {@code google.pubsub.v1.Subscription.AnalyticsHubSubscriptionInfo}
@@ -636,8 +637,8 @@ protected Builder newBuilderForType(
      *
      *
      * <pre>
-     * Information about an associated Analytics Hub subscription
-     * (https://cloud.google.com/bigquery/docs/analytics-hub-manage-subscriptions).
+     * Information about an associated [Analytics Hub
+     * subscription](https://cloud.google.com/bigquery/docs/analytics-hub-manage-subscriptions).
      * </pre>
      *
      * Protobuf type {@code google.pubsub.v1.Subscription.AnalyticsHubSubscriptionInfo}
@@ -2192,6 +2193,92 @@ public boolean hasAnalyticsHubSubscriptionInfo() {
         : analyticsHubSubscriptionInfo_;
   }
 
+  public static final int MESSAGE_TRANSFORMS_FIELD_NUMBER = 25;
+
+  @SuppressWarnings("serial")
+  private java.util.List<com.google.pubsub.v1.MessageTransform> messageTransforms_;
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.pubsub.v1.MessageTransform> getMessageTransformsList() {
+    return messageTransforms_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.pubsub.v1.MessageTransformOrBuilder>
+      getMessageTransformsOrBuilderList() {
+    return messageTransforms_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public int getMessageTransformsCount() {
+    return messageTransforms_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.pubsub.v1.MessageTransform getMessageTransforms(int index) {
+    return messageTransforms_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.pubsub.v1.MessageTransformOrBuilder getMessageTransformsOrBuilder(int index) {
+    return messageTransforms_.get(index);
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -2262,6 +2349,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (((bitField0_ & 0x00000100) != 0)) {
       output.writeMessage(23, getAnalyticsHubSubscriptionInfo());
     }
+    for (int i = 0; i < messageTransforms_.size(); i++) {
+      output.writeMessage(25, messageTransforms_.get(i));
+    }
     getUnknownFields().writeTo(output);
   }
 
@@ -2341,6 +2431,10 @@ public int getSerializedSize() {
           com.google.protobuf.CodedOutputStream.computeMessageSize(
               23, getAnalyticsHubSubscriptionInfo());
     }
+    for (int i = 0; i < messageTransforms_.size(); i++) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(25, messageTransforms_.get(i));
+    }
     size += getUnknownFields().getSerializedSize();
     memoizedSize = size;
     return size;
@@ -2405,6 +2499,7 @@ public boolean equals(final java.lang.Object obj) {
       if (!getAnalyticsHubSubscriptionInfo().equals(other.getAnalyticsHubSubscriptionInfo()))
         return false;
     }
+    if (!getMessageTransformsList().equals(other.getMessageTransformsList())) return false;
     if (!getUnknownFields().equals(other.getUnknownFields())) return false;
     return true;
   }
@@ -2474,6 +2569,10 @@ public int hashCode() {
       hash = (37 * hash) + ANALYTICS_HUB_SUBSCRIPTION_INFO_FIELD_NUMBER;
       hash = (53 * hash) + getAnalyticsHubSubscriptionInfo().hashCode();
     }
+    if (getMessageTransformsCount() > 0) {
+      hash = (37 * hash) + MESSAGE_TRANSFORMS_FIELD_NUMBER;
+      hash = (53 * hash) + getMessageTransformsList().hashCode();
+    }
     hash = (29 * hash) + getUnknownFields().hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -2646,6 +2745,7 @@ private void maybeForceBuilderInitialization() {
         getRetryPolicyFieldBuilder();
         getTopicMessageRetentionDurationFieldBuilder();
         getAnalyticsHubSubscriptionInfoFieldBuilder();
+        getMessageTransformsFieldBuilder();
       }
     }
 
@@ -2708,6 +2808,13 @@ public Builder clear() {
         analyticsHubSubscriptionInfoBuilder_.dispose();
         analyticsHubSubscriptionInfoBuilder_ = null;
       }
+      if (messageTransformsBuilder_ == null) {
+        messageTransforms_ = java.util.Collections.emptyList();
+      } else {
+        messageTransforms_ = null;
+        messageTransformsBuilder_.clear();
+      }
+      bitField0_ = (bitField0_ & ~0x00080000);
       return this;
     }
 
@@ -2734,6 +2841,7 @@ public com.google.pubsub.v1.Subscription build() {
     @java.lang.Override
     public com.google.pubsub.v1.Subscription buildPartial() {
       com.google.pubsub.v1.Subscription result = new com.google.pubsub.v1.Subscription(this);
+      buildPartialRepeatedFields(result);
       if (bitField0_ != 0) {
         buildPartial0(result);
       }
@@ -2741,6 +2849,18 @@ public com.google.pubsub.v1.Subscription buildPartial() {
       return result;
     }
 
+    private void buildPartialRepeatedFields(com.google.pubsub.v1.Subscription result) {
+      if (messageTransformsBuilder_ == null) {
+        if (((bitField0_ & 0x00080000) != 0)) {
+          messageTransforms_ = java.util.Collections.unmodifiableList(messageTransforms_);
+          bitField0_ = (bitField0_ & ~0x00080000);
+        }
+        result.messageTransforms_ = messageTransforms_;
+      } else {
+        result.messageTransforms_ = messageTransformsBuilder_.build();
+      }
+    }
+
     private void buildPartial0(com.google.pubsub.v1.Subscription result) {
       int from_bitField0_ = bitField0_;
       if (((from_bitField0_ & 0x00000001) != 0)) {
@@ -2937,6 +3057,33 @@ public Builder mergeFrom(com.google.pubsub.v1.Subscription other) {
       if (other.hasAnalyticsHubSubscriptionInfo()) {
         mergeAnalyticsHubSubscriptionInfo(other.getAnalyticsHubSubscriptionInfo());
       }
+      if (messageTransformsBuilder_ == null) {
+        if (!other.messageTransforms_.isEmpty()) {
+          if (messageTransforms_.isEmpty()) {
+            messageTransforms_ = other.messageTransforms_;
+            bitField0_ = (bitField0_ & ~0x00080000);
+          } else {
+            ensureMessageTransformsIsMutable();
+            messageTransforms_.addAll(other.messageTransforms_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.messageTransforms_.isEmpty()) {
+          if (messageTransformsBuilder_.isEmpty()) {
+            messageTransformsBuilder_.dispose();
+            messageTransformsBuilder_ = null;
+            messageTransforms_ = other.messageTransforms_;
+            bitField0_ = (bitField0_ & ~0x00080000);
+            messageTransformsBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getMessageTransformsFieldBuilder()
+                    : null;
+          } else {
+            messageTransformsBuilder_.addAllMessages(other.messageTransforms_);
+          }
+        }
+      }
       this.mergeUnknownFields(other.getUnknownFields());
       onChanged();
       return this;
@@ -3089,6 +3236,19 @@ public Builder mergeFrom(
                 bitField0_ |= 0x00040000;
                 break;
               } // case 186
+            case 202:
+              {
+                com.google.pubsub.v1.MessageTransform m =
+                    input.readMessage(
+                        com.google.pubsub.v1.MessageTransform.parser(), extensionRegistry);
+                if (messageTransformsBuilder_ == null) {
+                  ensureMessageTransformsIsMutable();
+                  messageTransforms_.add(m);
+                } else {
+                  messageTransformsBuilder_.addMessage(m);
+                }
+                break;
+              } // case 202
             default:
               {
                 if (!super.parseUnknownField(input, extensionRegistry, tag)) {
@@ -6282,6 +6442,414 @@ public Builder clearAnalyticsHubSubscriptionInfo() {
       return analyticsHubSubscriptionInfoBuilder_;
     }
 
+    private java.util.List<com.google.pubsub.v1.MessageTransform> messageTransforms_ =
+        java.util.Collections.emptyList();
+
+    private void ensureMessageTransformsIsMutable() {
+      if (!((bitField0_ & 0x00080000) != 0)) {
+        messageTransforms_ =
+            new java.util.ArrayList<com.google.pubsub.v1.MessageTransform>(messageTransforms_);
+        bitField0_ |= 0x00080000;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.pubsub.v1.MessageTransform,
+            com.google.pubsub.v1.MessageTransform.Builder,
+            com.google.pubsub.v1.MessageTransformOrBuilder>
+        messageTransformsBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public java.util.List<com.google.pubsub.v1.MessageTransform> getMessageTransformsList() {
+      if (messageTransformsBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(messageTransforms_);
+      } else {
+        return messageTransformsBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public int getMessageTransformsCount() {
+      if (messageTransformsBuilder_ == null) {
+        return messageTransforms_.size();
+      } else {
+        return messageTransformsBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransform getMessageTransforms(int index) {
+      if (messageTransformsBuilder_ == null) {
+        return messageTransforms_.get(index);
+      } else {
+        return messageTransformsBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder setMessageTransforms(int index, com.google.pubsub.v1.MessageTransform value) {
+      if (messageTransformsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.set(index, value);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder setMessageTransforms(
+        int index, com.google.pubsub.v1.MessageTransform.Builder builderForValue) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        messageTransformsBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addMessageTransforms(com.google.pubsub.v1.MessageTransform value) {
+      if (messageTransformsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.add(value);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addMessageTransforms(int index, com.google.pubsub.v1.MessageTransform value) {
+      if (messageTransformsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.add(index, value);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addMessageTransforms(
+        com.google.pubsub.v1.MessageTransform.Builder builderForValue) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.add(builderForValue.build());
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addMessageTransforms(
+        int index, com.google.pubsub.v1.MessageTransform.Builder builderForValue) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addAllMessageTransforms(
+        java.lang.Iterable<? extends com.google.pubsub.v1.MessageTransform> values) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, messageTransforms_);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder clearMessageTransforms() {
+      if (messageTransformsBuilder_ == null) {
+        messageTransforms_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00080000);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder removeMessageTransforms(int index) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.remove(index);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransform.Builder getMessageTransformsBuilder(int index) {
+      return getMessageTransformsFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransformOrBuilder getMessageTransformsOrBuilder(int index) {
+      if (messageTransformsBuilder_ == null) {
+        return messageTransforms_.get(index);
+      } else {
+        return messageTransformsBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public java.util.List<? extends com.google.pubsub.v1.MessageTransformOrBuilder>
+        getMessageTransformsOrBuilderList() {
+      if (messageTransformsBuilder_ != null) {
+        return messageTransformsBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(messageTransforms_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransform.Builder addMessageTransformsBuilder() {
+      return getMessageTransformsFieldBuilder()
+          .addBuilder(com.google.pubsub.v1.MessageTransform.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransform.Builder addMessageTransformsBuilder(int index) {
+      return getMessageTransformsFieldBuilder()
+          .addBuilder(index, com.google.pubsub.v1.MessageTransform.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages before they are delivered to
+     * subscribers. Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public java.util.List<com.google.pubsub.v1.MessageTransform.Builder>
+        getMessageTransformsBuilderList() {
+      return getMessageTransformsFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.pubsub.v1.MessageTransform,
+            com.google.pubsub.v1.MessageTransform.Builder,
+            com.google.pubsub.v1.MessageTransformOrBuilder>
+        getMessageTransformsFieldBuilder() {
+      if (messageTransformsBuilder_ == null) {
+        messageTransformsBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.pubsub.v1.MessageTransform,
+                com.google.pubsub.v1.MessageTransform.Builder,
+                com.google.pubsub.v1.MessageTransformOrBuilder>(
+                messageTransforms_,
+                ((bitField0_ & 0x00080000) != 0),
+                getParentForChildren(),
+                isClean());
+        messageTransforms_ = null;
+      }
+      return messageTransformsBuilder_;
+    }
+
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
       return super.setUnknownFields(unknownFields);
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SubscriptionOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SubscriptionOrBuilder.java
index 46c75a2b5..8e9b3000c 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SubscriptionOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SubscriptionOrBuilder.java
@@ -788,4 +788,71 @@ java.lang.String getLabelsOrDefault(
    */
   com.google.pubsub.v1.Subscription.AnalyticsHubSubscriptionInfoOrBuilder
       getAnalyticsHubSubscriptionInfoOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  java.util.List<com.google.pubsub.v1.MessageTransform> getMessageTransformsList();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  com.google.pubsub.v1.MessageTransform getMessageTransforms(int index);
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  int getMessageTransformsCount();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  java.util.List<? extends com.google.pubsub.v1.MessageTransformOrBuilder>
+      getMessageTransformsOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages before they are delivered to
+   * subscribers. Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 25 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  com.google.pubsub.v1.MessageTransformOrBuilder getMessageTransformsOrBuilder(int index);
 }
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Topic.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Topic.java
index 40872b062..5ee6a0772 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Topic.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Topic.java
@@ -42,6 +42,7 @@ private Topic() {
     name_ = "";
     kmsKeyName_ = "";
     state_ = 0;
+    messageTransforms_ = java.util.Collections.emptyList();
   }
 
   @java.lang.Override
@@ -771,6 +772,92 @@ public com.google.pubsub.v1.IngestionDataSourceSettings getIngestionDataSourceSe
         : ingestionDataSourceSettings_;
   }
 
+  public static final int MESSAGE_TRANSFORMS_FIELD_NUMBER = 13;
+
+  @SuppressWarnings("serial")
+  private java.util.List<com.google.pubsub.v1.MessageTransform> messageTransforms_;
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.List<com.google.pubsub.v1.MessageTransform> getMessageTransformsList() {
+    return messageTransforms_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public java.util.List<? extends com.google.pubsub.v1.MessageTransformOrBuilder>
+      getMessageTransformsOrBuilderList() {
+    return messageTransforms_;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public int getMessageTransformsCount() {
+    return messageTransforms_.size();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.pubsub.v1.MessageTransform getMessageTransforms(int index) {
+    return messageTransforms_.get(index);
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.pubsub.v1.MessageTransformOrBuilder getMessageTransformsOrBuilder(int index) {
+    return messageTransforms_.get(index);
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -811,6 +898,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (((bitField0_ & 0x00000008) != 0)) {
       output.writeMessage(10, getIngestionDataSourceSettings());
     }
+    for (int i = 0; i < messageTransforms_.size(); i++) {
+      output.writeMessage(13, messageTransforms_.get(i));
+    }
     getUnknownFields().writeTo(output);
   }
 
@@ -859,6 +949,10 @@ public int getSerializedSize() {
           com.google.protobuf.CodedOutputStream.computeMessageSize(
               10, getIngestionDataSourceSettings());
     }
+    for (int i = 0; i < messageTransforms_.size(); i++) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(13, messageTransforms_.get(i));
+    }
     size += getUnknownFields().getSerializedSize();
     memoizedSize = size;
     return size;
@@ -896,6 +990,7 @@ public boolean equals(final java.lang.Object obj) {
       if (!getIngestionDataSourceSettings().equals(other.getIngestionDataSourceSettings()))
         return false;
     }
+    if (!getMessageTransformsList().equals(other.getMessageTransformsList())) return false;
     if (!getUnknownFields().equals(other.getUnknownFields())) return false;
     return true;
   }
@@ -935,6 +1030,10 @@ public int hashCode() {
       hash = (37 * hash) + INGESTION_DATA_SOURCE_SETTINGS_FIELD_NUMBER;
       hash = (53 * hash) + getIngestionDataSourceSettings().hashCode();
     }
+    if (getMessageTransformsCount() > 0) {
+      hash = (37 * hash) + MESSAGE_TRANSFORMS_FIELD_NUMBER;
+      hash = (53 * hash) + getMessageTransformsList().hashCode();
+    }
     hash = (29 * hash) + getUnknownFields().hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -1098,6 +1197,7 @@ private void maybeForceBuilderInitialization() {
         getSchemaSettingsFieldBuilder();
         getMessageRetentionDurationFieldBuilder();
         getIngestionDataSourceSettingsFieldBuilder();
+        getMessageTransformsFieldBuilder();
       }
     }
 
@@ -1130,6 +1230,13 @@ public Builder clear() {
         ingestionDataSourceSettingsBuilder_.dispose();
         ingestionDataSourceSettingsBuilder_ = null;
       }
+      if (messageTransformsBuilder_ == null) {
+        messageTransforms_ = java.util.Collections.emptyList();
+      } else {
+        messageTransforms_ = null;
+        messageTransformsBuilder_.clear();
+      }
+      bitField0_ = (bitField0_ & ~0x00000200);
       return this;
     }
 
@@ -1155,6 +1262,7 @@ public com.google.pubsub.v1.Topic build() {
     @java.lang.Override
     public com.google.pubsub.v1.Topic buildPartial() {
       com.google.pubsub.v1.Topic result = new com.google.pubsub.v1.Topic(this);
+      buildPartialRepeatedFields(result);
       if (bitField0_ != 0) {
         buildPartial0(result);
       }
@@ -1162,6 +1270,18 @@ public com.google.pubsub.v1.Topic buildPartial() {
       return result;
     }
 
+    private void buildPartialRepeatedFields(com.google.pubsub.v1.Topic result) {
+      if (messageTransformsBuilder_ == null) {
+        if (((bitField0_ & 0x00000200) != 0)) {
+          messageTransforms_ = java.util.Collections.unmodifiableList(messageTransforms_);
+          bitField0_ = (bitField0_ & ~0x00000200);
+        }
+        result.messageTransforms_ = messageTransforms_;
+      } else {
+        result.messageTransforms_ = messageTransformsBuilder_.build();
+      }
+    }
+
     private void buildPartial0(com.google.pubsub.v1.Topic result) {
       int from_bitField0_ = bitField0_;
       if (((from_bitField0_ & 0x00000001) != 0)) {
@@ -1285,6 +1405,33 @@ public Builder mergeFrom(com.google.pubsub.v1.Topic other) {
       if (other.hasIngestionDataSourceSettings()) {
         mergeIngestionDataSourceSettings(other.getIngestionDataSourceSettings());
       }
+      if (messageTransformsBuilder_ == null) {
+        if (!other.messageTransforms_.isEmpty()) {
+          if (messageTransforms_.isEmpty()) {
+            messageTransforms_ = other.messageTransforms_;
+            bitField0_ = (bitField0_ & ~0x00000200);
+          } else {
+            ensureMessageTransformsIsMutable();
+            messageTransforms_.addAll(other.messageTransforms_);
+          }
+          onChanged();
+        }
+      } else {
+        if (!other.messageTransforms_.isEmpty()) {
+          if (messageTransformsBuilder_.isEmpty()) {
+            messageTransformsBuilder_.dispose();
+            messageTransformsBuilder_ = null;
+            messageTransforms_ = other.messageTransforms_;
+            bitField0_ = (bitField0_ & ~0x00000200);
+            messageTransformsBuilder_ =
+                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                    ? getMessageTransformsFieldBuilder()
+                    : null;
+          } else {
+            messageTransformsBuilder_.addAllMessages(other.messageTransforms_);
+          }
+        }
+      }
       this.mergeUnknownFields(other.getUnknownFields());
       onChanged();
       return this;
@@ -1374,6 +1521,19 @@ public Builder mergeFrom(
                 bitField0_ |= 0x00000100;
                 break;
               } // case 82
+            case 106:
+              {
+                com.google.pubsub.v1.MessageTransform m =
+                    input.readMessage(
+                        com.google.pubsub.v1.MessageTransform.parser(), extensionRegistry);
+                if (messageTransformsBuilder_ == null) {
+                  ensureMessageTransformsIsMutable();
+                  messageTransforms_.add(m);
+                } else {
+                  messageTransformsBuilder_.addMessage(m);
+                }
+                break;
+              } // case 106
             default:
               {
                 if (!super.parseUnknownField(input, extensionRegistry, tag)) {
@@ -2876,6 +3036,414 @@ public Builder clearIngestionDataSourceSettings() {
       return ingestionDataSourceSettingsBuilder_;
     }
 
+    private java.util.List<com.google.pubsub.v1.MessageTransform> messageTransforms_ =
+        java.util.Collections.emptyList();
+
+    private void ensureMessageTransformsIsMutable() {
+      if (!((bitField0_ & 0x00000200) != 0)) {
+        messageTransforms_ =
+            new java.util.ArrayList<com.google.pubsub.v1.MessageTransform>(messageTransforms_);
+        bitField0_ |= 0x00000200;
+      }
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.pubsub.v1.MessageTransform,
+            com.google.pubsub.v1.MessageTransform.Builder,
+            com.google.pubsub.v1.MessageTransformOrBuilder>
+        messageTransformsBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public java.util.List<com.google.pubsub.v1.MessageTransform> getMessageTransformsList() {
+      if (messageTransformsBuilder_ == null) {
+        return java.util.Collections.unmodifiableList(messageTransforms_);
+      } else {
+        return messageTransformsBuilder_.getMessageList();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public int getMessageTransformsCount() {
+      if (messageTransformsBuilder_ == null) {
+        return messageTransforms_.size();
+      } else {
+        return messageTransformsBuilder_.getCount();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransform getMessageTransforms(int index) {
+      if (messageTransformsBuilder_ == null) {
+        return messageTransforms_.get(index);
+      } else {
+        return messageTransformsBuilder_.getMessage(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder setMessageTransforms(int index, com.google.pubsub.v1.MessageTransform value) {
+      if (messageTransformsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.set(index, value);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.setMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder setMessageTransforms(
+        int index, com.google.pubsub.v1.MessageTransform.Builder builderForValue) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.set(index, builderForValue.build());
+        onChanged();
+      } else {
+        messageTransformsBuilder_.setMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addMessageTransforms(com.google.pubsub.v1.MessageTransform value) {
+      if (messageTransformsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.add(value);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addMessage(value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addMessageTransforms(int index, com.google.pubsub.v1.MessageTransform value) {
+      if (messageTransformsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.add(index, value);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addMessage(index, value);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addMessageTransforms(
+        com.google.pubsub.v1.MessageTransform.Builder builderForValue) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.add(builderForValue.build());
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addMessage(builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addMessageTransforms(
+        int index, com.google.pubsub.v1.MessageTransform.Builder builderForValue) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.add(index, builderForValue.build());
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addMessage(index, builderForValue.build());
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder addAllMessageTransforms(
+        java.lang.Iterable<? extends com.google.pubsub.v1.MessageTransform> values) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, messageTransforms_);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.addAllMessages(values);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder clearMessageTransforms() {
+      if (messageTransformsBuilder_ == null) {
+        messageTransforms_ = java.util.Collections.emptyList();
+        bitField0_ = (bitField0_ & ~0x00000200);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public Builder removeMessageTransforms(int index) {
+      if (messageTransformsBuilder_ == null) {
+        ensureMessageTransformsIsMutable();
+        messageTransforms_.remove(index);
+        onChanged();
+      } else {
+        messageTransformsBuilder_.remove(index);
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransform.Builder getMessageTransformsBuilder(int index) {
+      return getMessageTransformsFieldBuilder().getBuilder(index);
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransformOrBuilder getMessageTransformsOrBuilder(int index) {
+      if (messageTransformsBuilder_ == null) {
+        return messageTransforms_.get(index);
+      } else {
+        return messageTransformsBuilder_.getMessageOrBuilder(index);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public java.util.List<? extends com.google.pubsub.v1.MessageTransformOrBuilder>
+        getMessageTransformsOrBuilderList() {
+      if (messageTransformsBuilder_ != null) {
+        return messageTransformsBuilder_.getMessageOrBuilderList();
+      } else {
+        return java.util.Collections.unmodifiableList(messageTransforms_);
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransform.Builder addMessageTransformsBuilder() {
+      return getMessageTransformsFieldBuilder()
+          .addBuilder(com.google.pubsub.v1.MessageTransform.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public com.google.pubsub.v1.MessageTransform.Builder addMessageTransformsBuilder(int index) {
+      return getMessageTransformsFieldBuilder()
+          .addBuilder(index, com.google.pubsub.v1.MessageTransform.getDefaultInstance());
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Optional. Transforms to be applied to messages published to the topic.
+     * Transforms are applied in the order specified.
+     * </pre>
+     *
+     * <code>
+     * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+     * </code>
+     */
+    public java.util.List<com.google.pubsub.v1.MessageTransform.Builder>
+        getMessageTransformsBuilderList() {
+      return getMessageTransformsFieldBuilder().getBuilderList();
+    }
+
+    private com.google.protobuf.RepeatedFieldBuilderV3<
+            com.google.pubsub.v1.MessageTransform,
+            com.google.pubsub.v1.MessageTransform.Builder,
+            com.google.pubsub.v1.MessageTransformOrBuilder>
+        getMessageTransformsFieldBuilder() {
+      if (messageTransformsBuilder_ == null) {
+        messageTransformsBuilder_ =
+            new com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.pubsub.v1.MessageTransform,
+                com.google.pubsub.v1.MessageTransform.Builder,
+                com.google.pubsub.v1.MessageTransformOrBuilder>(
+                messageTransforms_,
+                ((bitField0_ & 0x00000200) != 0),
+                getParentForChildren(),
+                isClean());
+        messageTransforms_ = null;
+      }
+      return messageTransformsBuilder_;
+    }
+
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
       return super.setUnknownFields(unknownFields);
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/TopicOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/TopicOrBuilder.java
index 8f58e61bd..3af29ee9f 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/TopicOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/TopicOrBuilder.java
@@ -388,4 +388,71 @@ java.lang.String getLabelsOrDefault(
    */
   com.google.pubsub.v1.IngestionDataSourceSettingsOrBuilder
       getIngestionDataSourceSettingsOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  java.util.List<com.google.pubsub.v1.MessageTransform> getMessageTransformsList();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  com.google.pubsub.v1.MessageTransform getMessageTransforms(int index);
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  int getMessageTransformsCount();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  java.util.List<? extends com.google.pubsub.v1.MessageTransformOrBuilder>
+      getMessageTransformsOrBuilderList();
+  /**
+   *
+   *
+   * <pre>
+   * Optional. Transforms to be applied to messages published to the topic.
+   * Transforms are applied in the order specified.
+   * </pre>
+   *
+   * <code>
+   * repeated .google.pubsub.v1.MessageTransform message_transforms = 13 [(.google.api.field_behavior) = OPTIONAL];
+   * </code>
+   */
+  com.google.pubsub.v1.MessageTransformOrBuilder getMessageTransformsOrBuilder(int index);
 }
diff --git a/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/pubsub.proto b/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/pubsub.proto
index 6ed87cbba..b881f8fa3 100644
--- a/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/pubsub.proto
+++ b/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/pubsub.proto
@@ -26,7 +26,6 @@ import "google/protobuf/field_mask.proto";
 import "google/protobuf/timestamp.proto";
 import "google/pubsub/v1/schema.proto";
 
-option cc_enable_arenas = true;
 option csharp_namespace = "Google.Cloud.PubSub.V1";
 option go_package = "cloud.google.com/go/pubsub/apiv1/pubsubpb;pubsubpb";
 option java_multiple_files = true;
@@ -674,12 +673,68 @@ message IngestionFailureEvent {
   }
 }
 
+// User-defined JavaScript function that can transform or filter a Pub/Sub
+// message.
+message JavaScriptUDF {
+  // Required. Name of the JavasScript function that should applied to Pub/Sub
+  // messages.
+  string function_name = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. JavaScript code that contains a function `function_name` with the
+  // below signature:
+  //
+  // ```
+  //   /**
+  //   * Transforms a Pub/Sub message.
+  //
+  //   * @return {(Object<string, (string | Object<string, string>)>|null)} - To
+  //   * filter a message, return `null`. To transform a message return a map
+  //   * with the following keys:
+  //   *   - (required) 'data' : {string}
+  //   *   - (optional) 'attributes' : {Object<string, string>}
+  //   * Returning empty `attributes` will remove all attributes from the
+  //   * message.
+  //   *
+  //   * @param  {(Object<string, (string | Object<string, string>)>} Pub/Sub
+  //   * message. Keys:
+  //   *   - (required) 'data' : {string}
+  //   *   - (required) 'attributes' : {Object<string, string>}
+  //   *
+  //   * @param  {Object<string, any>} metadata - Pub/Sub message metadata.
+  //   * Keys:
+  //   *   - (required) 'message_id'  : {string}
+  //   *   - (optional) 'publish_time': {string} YYYY-MM-DDTHH:MM:SSZ format
+  //   *   - (optional) 'ordering_key': {string}
+  //   */
+  //
+  //   function <function_name>(message, metadata) {
+  //   }
+  // ```
+  string code = 2 [(google.api.field_behavior) = REQUIRED];
+}
+
+// All supported message transforms types.
+message MessageTransform {
+  // The type of transform to apply to messages.
+  oneof transform {
+    // Optional. JavaScript User Defined Function. If multiple JavaScriptUDF's
+    // are specified on a resource, each must have a unique `function_name`.
+    JavaScriptUDF javascript_udf = 2 [(google.api.field_behavior) = OPTIONAL];
+  }
+
+  // Optional. If set to true, the transform is enabled. If false, the transform
+  // is disabled and will not be applied to messages. Defaults to `true`.
+  bool enabled = 3 [(google.api.field_behavior) = OPTIONAL];
+}
+
 // A topic resource.
 message Topic {
   option (google.api.resource) = {
     type: "pubsub.googleapis.com/Topic"
     pattern: "projects/{project}/topics/{topic}"
     pattern: "_deleted-topic_"
+    plural: "topics"
+    singular: "topic"
   };
 
   // The state of the topic.
@@ -745,6 +800,11 @@ message Topic {
   // Optional. Settings for ingestion from a data source into this topic.
   IngestionDataSourceSettings ingestion_data_source_settings = 10
       [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. Transforms to be applied to messages published to the topic.
+  // Transforms are applied in the order specified.
+  repeated MessageTransform message_transforms = 13
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // A message that is published by publishers and consumed by subscribers. The
@@ -1188,6 +1248,8 @@ message Subscription {
   option (google.api.resource) = {
     type: "pubsub.googleapis.com/Subscription"
     pattern: "projects/{project}/subscriptions/{subscription}"
+    plural: "subscriptions"
+    singular: "subscription"
   };
 
   // Possible states for a subscription.
@@ -1204,8 +1266,8 @@ message Subscription {
     RESOURCE_ERROR = 2;
   }
 
-  // Information about an associated Analytics Hub subscription
-  // (https://cloud.google.com/bigquery/docs/analytics-hub-manage-subscriptions).
+  // Information about an associated [Analytics Hub
+  // subscription](https://cloud.google.com/bigquery/docs/analytics-hub-manage-subscriptions).
   message AnalyticsHubSubscriptionInfo {
     // Optional. The name of the associated Analytics Hub listing resource.
     // Pattern:
@@ -1371,6 +1433,11 @@ message Subscription {
   // Only set if the subscritpion is created by Analytics Hub.
   AnalyticsHubSubscriptionInfo analytics_hub_subscription_info = 23
       [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Optional. Transforms to be applied to messages before they are delivered to
+  // subscribers. Transforms are applied in the order specified.
+  repeated MessageTransform message_transforms = 25
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // A policy that specifies how Pub/Sub retries message delivery.
@@ -2109,6 +2176,8 @@ message Snapshot {
   option (google.api.resource) = {
     type: "pubsub.googleapis.com/Snapshot"
     pattern: "projects/{project}/snapshots/{snapshot}"
+    plural: "snapshots"
+    singular: "snapshot"
   };
 
   // Optional. The name of the snapshot.
diff --git a/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/schema.proto b/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/schema.proto
index d52c678c5..81d56bd7f 100644
--- a/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/schema.proto
+++ b/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/schema.proto
@@ -23,7 +23,6 @@ import "google/api/resource.proto";
 import "google/protobuf/empty.proto";
 import "google/protobuf/timestamp.proto";
 
-option cc_enable_arenas = true;
 option csharp_namespace = "Google.Cloud.PubSub.V1";
 option go_package = "cloud.google.com/go/pubsub/apiv1/pubsubpb;pubsubpb";
 option java_multiple_files = true;