Retrieve position of /CropBox. Return (0,0) for non-PDF, or no /CropBox.

def CropBoxPosition(self):
        """Retrieve position of /CropBox. Return (0,0) for non-PDF, or no /CropBox."""
        CheckParent(self)

        val = _fitz.Page_CropBoxPosition(self)
        val = Point(val)

        return val