Adding BatchingSettings getter to BatchingCallSettings.Builder

gax/src/main/java/com/google/api/gax/batching/BatchingCallSettings.java

@@ -133,6 +133,11 @@ public Builder<ElementT, ElementResultT, RequestT, ResponseT> setBatchingSetting
       return this;
     }
 
+    /** Returns the {@link BatchingSettings}. */
+    public BatchingSettings getBatchingSettings() {
+      return batchingSettings;
+    }
+
     /** Sets the rpc failure {@link StatusCode.Code code}, for which retries should be performed. */
     @Override
     public Builder<ElementT, ElementResultT, RequestT, ResponseT> setRetryableCodes(

gax/src/test/java/com/google/api/gax/batching/BatchingCallSettingsTest.java

@@ -63,6 +63,7 @@ public class BatchingCallSettingsTest {
   public void testEmptyBuilder() {
     BatchingCallSettings.Builder<Integer, Integer, LabeledIntList, List<Integer>> builder =
         BatchingCallSettings.newBuilder(SQUARER_BATCHING_DESC_V2);
+    assertThat(builder.getBatchingSettings()).isNull();
     assertThat(builder.getRetryableCodes()).isEmpty();
     assertThat(builder.getRetrySettings()).isNotNull();
   }
@@ -99,6 +100,7 @@ public void testBuilderFromSettings() {
     BatchingCallSettings settings = builder.build();
     BatchingCallSettings.Builder newBuilder = settings.toBuilder();
 
+    assertThat(newBuilder.getBatchingSettings()).isEqualTo(BATCHING_SETTINGS);
     assertThat(newBuilder.getRetryableCodes())
         .containsExactly(StatusCode.Code.UNAVAILABLE, StatusCode.Code.UNAUTHENTICATED);
     assertThat(newBuilder.getRetrySettings()).isEqualTo(retrySettings);