private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.videointelligence.v1.NormalizedBoundingBox,
            com.google.cloud.videointelligence.v1.NormalizedBoundingBox.Builder,
            com.google.cloud.videointelligence.v1.NormalizedBoundingBoxOrBuilder>
        getNormalizedBoundingBoxFieldBuilder() {
      if (normalizedBoundingBoxBuilder_ == null) {
        normalizedBoundingBoxBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.videointelligence.v1.NormalizedBoundingBox,
                com.google.cloud.videointelligence.v1.NormalizedBoundingBox.Builder,
                com.google.cloud.videointelligence.v1.NormalizedBoundingBoxOrBuilder>(
                getNormalizedBoundingBox(), getParentForChildren(), isClean());
        normalizedBoundingBox_ = null;
      }
      return normalizedBoundingBoxBuilder_;
    }
<pre>
Normalized Bounding box in a frame, where the object is located.
</pre>

<code>.google.cloud.videointelligence.v1.NormalizedBoundingBox normalized_bounding_box = 1;
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/TimestampedObject.java