def get_refs(self):
        raise NotImplementedError
Remove an edge between u and v.
dataset/ETHPy150Open natestedman/Observatory/observatory/lib/dulwich/server.py/BackendRepo.get_refs--crossover with--dataset/ETHPy150Open networkx/networkx/networkx/classes/tests/timingclasses.py/TimingMultiDiGraph.remove_edge