public com.google.cloud.videointelligence.v1.ObjectTrackingAnnotation.Builder
        addObjectAnnotationsBuilder() {
      return getObjectAnnotationsFieldBuilder()
          .addBuilder(
              com.google.cloud.videointelligence.v1.ObjectTrackingAnnotation.getDefaultInstance());
    }
<pre>
Annotations for list of objects detected and tracked in video.
</pre>

<code>
repeated .google.cloud.videointelligence.v1.ObjectTrackingAnnotation object_annotations = 14;
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/VideoAnnotationResults.java