private void ensureManifestsIsMutable() {
      if (!((bitField0_ & 0x00000010) != 0)) {
        manifests_ =
            new java.util.ArrayList<com.google.cloud.video.transcoder.v1.Manifest>(manifests_);
        bitField0_ |= 0x00000010;
      }
    }
<pre>
List of multiplexing settings for output streams.
</pre>

<code>repeated .google.cloud.video.transcoder.v1.MuxStream mux_streams = 4;</code>
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/JobConfig.java