def _rel_ref_count(self, rId):
        rIds = self._element.xpath('//@r:id')
        return len([_rId for _rId in rIds if _rId == rId])
Return the count of references in this part's XML to the relationship
dataset/ETHPy150Open scanny/python-pptx/pptx/opc/package.py/Part._rel_ref_count