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<pre>
Boundingbox for detected object. I.e. the rectangle over the video frame
pinpointing the found AnnotationSpec. The coordinates are relative to the
frame size, and the point 0,0 is in the top left of the frame.
</pre>

Protobuf type {@code
google.cloud.visionai.v1.VideoObjectTrackingPredictionResult.BoundingBox}
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/VideoObjectTrackingPredictionResult.java