private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.livestream.v1.Event.MuteTask,
            com.google.cloud.video.livestream.v1.Event.MuteTask.Builder,
            com.google.cloud.video.livestream.v1.Event.MuteTaskOrBuilder>
        getMuteFieldBuilder() {
      if (muteBuilder_ == null) {
        if (!(taskCase_ == 15)) {
          task_ = com.google.cloud.video.livestream.v1.Event.MuteTask.getDefaultInstance();
        }
        muteBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.livestream.v1.Event.MuteTask,
                com.google.cloud.video.livestream.v1.Event.MuteTask.Builder,
                com.google.cloud.video.livestream.v1.Event.MuteTaskOrBuilder>(
                (com.google.cloud.video.livestream.v1.Event.MuteTask) task_,
                getParentForChildren(),
                isClean());
        task_ = null;
      }
      taskCase_ = 15;
      onChanged();
      return muteBuilder_;
    }
<pre>
Mutes the stream.
</pre>

<code>.google.cloud.video.livestream.v1.Event.MuteTask mute = 15;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Event.java