public Builder setTracks(
        int index, com.google.cloud.videointelligence.v1p3beta1.Track.Builder builderForValue) {
      if (tracksBuilder_ == null) {
        ensureTracksIsMutable();
        tracks_.set(index, builderForValue.build());
        onChanged();
      } else {
        tracksBuilder_.setMessage(index, builderForValue.build());
      }
      return this;
    }
<pre>
All logo tracks where the recognized logo appears. Each track corresponds
to one logo instance appearing in consecutive frames.
</pre>

<code>repeated .google.cloud.videointelligence.v1p3beta1.Track tracks = 2;</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1p3beta1/src/main/java/com/google/cloud/videointelligence/v1p3beta1/LogoRecognitionAnnotation.java