private void maybeForceBuilderInitialization() {
      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
        getCelebritiesFieldBuilder();
        getFaceTrackFieldBuilder();
      }
    }
<pre>
The annotation result of a celebrity face track. RecognizedCelebrity field
could be empty if the face track does not have any matched celebrities.
</pre>

Protobuf type {@code google.cloud.videointelligence.v1p3beta1.CelebrityTrack}
java-video-intelligence/proto-google-cloud-video-intelligence-v1p3beta1/src/main/java/com/google/cloud/videointelligence/v1p3beta1/CelebrityTrack.java