@java.lang.Override
  public com.google.cloud.videointelligence.v1.Track getTracks(int index) {
    return tracks_.get(index);
  }
<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.v1.Track tracks = 2;</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/LogoRecognitionAnnotation.java