public com.google.cloud.videointelligence.v1p3beta1.NormalizedBoundingBox
        getNormalizedBoundingBox() {
      if (normalizedBoundingBoxBuilder_ == null) {
        return normalizedBoundingBox_ == null
            ? com.google.cloud.videointelligence.v1p3beta1.NormalizedBoundingBox
                .getDefaultInstance()
            : normalizedBoundingBox_;
      } else {
        return normalizedBoundingBoxBuilder_.getMessage();
      }
    }
<pre>
The normalized bounding box location of this object track for the frame.
</pre>

<code>
.google.cloud.videointelligence.v1p3beta1.NormalizedBoundingBox normalized_bounding_box = 1;
</code>

@return The normalizedBoundingBox.
java-video-intelligence/proto-google-cloud-video-intelligence-v1p3beta1/src/main/java/com/google/cloud/videointelligence/v1p3beta1/ObjectTrackingFrame.java