@lazyproperty
    def rels(self):
        return RelationshipCollection(PACKAGE_URI.baseURI)
@return: the bounding boxes of the external contours of the foreground mask.
dataset/ETHPy150Open scanny/python-pptx/pptx/opc/package.py/OpcPackage.rels--crossover with--dataset/ETHPy150Open bolme/pyvision/src/pyvision/surveillance/MotionDetector.py/MotionDetector.getBoundingRects