public Builder removeNormalizedBoundingBoxes(int index) {
      if (normalizedBoundingBoxesBuilder_ == null) {
        ensureNormalizedBoundingBoxesIsMutable();
        normalizedBoundingBoxes_.remove(index);
        onChanged();
      } else {
        normalizedBoundingBoxesBuilder_.remove(index);
      }
      return this;
    }
<pre>
Normalized Bounding boxes in a frame.
There can be more than one boxes if the same face is detected in multiple
locations within the current frame.
</pre>

<code>
repeated .google.cloud.videointelligence.v1beta2.NormalizedBoundingBox normalized_bounding_boxes = 1;
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1beta2/src/main/java/com/google/cloud/videointelligence/v1beta2/FaceFrame.java