diff --git a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechSettings.java b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechSettings.java
index a0284c78..d71f1419 100644
--- a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechSettings.java
+++ b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechSettings.java
@@ -161,14 +161,13 @@ public TextToSpeechStubSettings.Builder getStubSettingsBuilder() {
       return ((TextToSpeechStubSettings.Builder) getStubSettings());
     }
 
-    // NEXT_MAJOR_VER: remove 'throws Exception'.
     /**
      * Applies the given settings updater function to all of the unary API methods in this service.
      *
      * <p>Note: This method does not support applying settings to streaming methods.
      */
     public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
       super.applyToAllUnaryMethods(
           getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
       return this;
diff --git a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/GrpcTextToSpeechStub.java b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/GrpcTextToSpeechStub.java
index 8de68fb1..481d6ee5 100644
--- a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/GrpcTextToSpeechStub.java
+++ b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/GrpcTextToSpeechStub.java
@@ -145,7 +145,13 @@ public UnaryCallable<ListVoicesRequest, ListVoicesResponse> listVoicesCallable()
 
   @Override
   public final void close() {
-    shutdown();
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
   }
 
   @Override
diff --git a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/TextToSpeechStubSettings.java b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/TextToSpeechStubSettings.java
index c7d0b23f..945075c7 100644
--- a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/TextToSpeechStubSettings.java
+++ b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/TextToSpeechStubSettings.java
@@ -269,14 +269,13 @@ private static Builder initDefaults(Builder builder) {
       return builder;
     }
 
-    // NEXT_MAJOR_VER: remove 'throws Exception'.
     /**
      * Applies the given settings updater function to all of the unary API methods in this service.
      *
      * <p>Note: This method does not support applying settings to streaming methods.
      */
     public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
       super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
       return this;
     }
diff --git a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java
index 01a6990b..b5004b43 100644
--- a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java
+++ b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java
@@ -162,14 +162,13 @@ public TextToSpeechStubSettings.Builder getStubSettingsBuilder() {
       return ((TextToSpeechStubSettings.Builder) getStubSettings());
     }
 
-    // NEXT_MAJOR_VER: remove 'throws Exception'.
     /**
      * Applies the given settings updater function to all of the unary API methods in this service.
      *
      * <p>Note: This method does not support applying settings to streaming methods.
      */
     public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
       super.applyToAllUnaryMethods(
           getStubSettingsBuilder().unaryMethodSettingsBuilders(), settingsUpdater);
       return this;
diff --git a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/GrpcTextToSpeechStub.java b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/GrpcTextToSpeechStub.java
index 610112b1..6892f92b 100644
--- a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/GrpcTextToSpeechStub.java
+++ b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/GrpcTextToSpeechStub.java
@@ -147,7 +147,13 @@ public UnaryCallable<ListVoicesRequest, ListVoicesResponse> listVoicesCallable()
 
   @Override
   public final void close() {
-    shutdown();
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
   }
 
   @Override
diff --git a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechStubSettings.java b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechStubSettings.java
index 6de0fb2c..4b3ee660 100644
--- a/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechStubSettings.java
+++ b/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechStubSettings.java
@@ -270,14 +270,13 @@ private static Builder initDefaults(Builder builder) {
       return builder;
     }
 
-    // NEXT_MAJOR_VER: remove 'throws Exception'.
     /**
      * Applies the given settings updater function to all of the unary API methods in this service.
      *
      * <p>Note: This method does not support applying settings to streaming methods.
      */
     public Builder applyToAllUnaryMethods(
-        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) throws Exception {
+        ApiFunction<UnaryCallSettings.Builder<?, ?>, Void> settingsUpdater) {
       super.applyToAllUnaryMethods(unaryMethodSettingsBuilders, settingsUpdater);
       return this;
     }
diff --git a/synth.metadata b/synth.metadata
index c291adf8..d4a28629 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -11,16 +11,16 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "08c4eeb531c01ad031134dca94b18e3f7dd35902",
-        "internalRef": "378718217"
+        "sha": "d9eaf41de44d953458b18712a3f240bb4c564e48",
+        "internalRef": "388535346"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "08c4eeb531c01ad031134dca94b18e3f7dd35902",
-        "internalRef": "378718217"
+        "sha": "d9eaf41de44d953458b18712a3f240bb4c564e48",
+        "internalRef": "388535346"
       }
     },
     {