def get_or_add_xfrm(self):
        return self.grpSpPr.get_or_add_xfrm()
Return the ``<a:xfrm>`` grandchild element, newly-added if not
dataset/ETHPy150Open scanny/python-pptx/pptx/oxml/shapes/groupshape.py/CT_GroupShape.get_or_add_xfrm