@property
    def is_multicast(self):
        return self in IPv4Network('224.0.0.0/4')
Return the ``<a:xfrm>`` grandchild element, newly-added if not
dataset/ETHPy150Open anandology/pyjamas/pyjs/src/pyjs/lib/ipaddr.py/_BaseV4.is_multicast--crossover with--dataset/ETHPy150Open scanny/python-pptx/pptx/oxml/shapes/shared.py/BaseShapeElement.get_or_add_xfrm