private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.videointelligence.v1p3beta1.VideoSegment,
            com.google.cloud.videointelligence.v1p3beta1.VideoSegment.Builder,
            com.google.cloud.videointelligence.v1p3beta1.VideoSegmentOrBuilder>
        getSegmentFieldBuilder() {
      if (segmentBuilder_ == null) {
        if (!(trackInfoCase_ == 3)) {
          trackInfo_ =
              com.google.cloud.videointelligence.v1p3beta1.VideoSegment.getDefaultInstance();
        }
        segmentBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.videointelligence.v1p3beta1.VideoSegment,
                com.google.cloud.videointelligence.v1p3beta1.VideoSegment.Builder,
                com.google.cloud.videointelligence.v1p3beta1.VideoSegmentOrBuilder>(
                (com.google.cloud.videointelligence.v1p3beta1.VideoSegment) trackInfo_,
                getParentForChildren(),
                isClean());
        trackInfo_ = null;
      }
      trackInfoCase_ = 3;
      onChanged();
      return segmentBuilder_;
    }
<pre>
Non-streaming batch mode ONLY.
Each object track corresponds to one video segment where it appears.
</pre>

<code>.google.cloud.videointelligence.v1p3beta1.VideoSegment segment = 3;</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1p3beta1/src/main/java/com/google/cloud/videointelligence/v1p3beta1/ObjectTrackingAnnotation.java