@abc.abstractmethod
    def is_supported(self):
        pass
Check if the object passed is undefined.  This does nothing more than
dataset/ETHPy150Open CiscoSystems/avos/openstack_dashboard/api/network_base.py/FloatingIpManager.is_supported--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/jinja2-2.6/jinja2/utils.py/is_undefined