@abc.abstractmethod
    def merge(self, other):
@see: twisted.names.client.lookupResponsibility
dataset/ETHPy150Open openstack/rally/rally/task/sla.py/SLA.merge--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/names/common.py/ResolverBase.lookupResponsibility