def _verifyHostKey(self, hostKey, fingerprint):
        if fingerprint in self.knownHosts:
            return defer.succeed(True)
        return defer.fail(UnknownHostKey(hostKey, fingerprint))
Breaks up a cyclic graph and returns a list of severed
dataset/ETHPy150Open sporsh/carnifex/carnifex/sshprocess.py/SSHProcessInductor._verifyHostKey--crossover with--dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.main/src/openmdao/main/depgraph.py/break_cycles