private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.livestream.v1.Event.ReturnToProgramTask,
            com.google.cloud.video.livestream.v1.Event.ReturnToProgramTask.Builder,
            com.google.cloud.video.livestream.v1.Event.ReturnToProgramTaskOrBuilder>
        getReturnToProgramFieldBuilder() {
      if (returnToProgramBuilder_ == null) {
        if (!(taskCase_ == 13)) {
          task_ =
              com.google.cloud.video.livestream.v1.Event.ReturnToProgramTask.getDefaultInstance();
        }
        returnToProgramBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.livestream.v1.Event.ReturnToProgramTask,
                com.google.cloud.video.livestream.v1.Event.ReturnToProgramTask.Builder,
                com.google.cloud.video.livestream.v1.Event.ReturnToProgramTaskOrBuilder>(
                (com.google.cloud.video.livestream.v1.Event.ReturnToProgramTask) task_,
                getParentForChildren(),
                isClean());
        task_ = null;
      }
      taskCase_ = 13;
      onChanged();
      return returnToProgramBuilder_;
    }
<pre>
Stops any running ad break.
</pre>

<code>.google.cloud.video.livestream.v1.Event.ReturnToProgramTask return_to_program = 13;
</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Event.java