def callRemote(self, command, **kwargs):
        d = Deferred()
        response = self._client.callRemote(command, **kwargs)
        self._calls.append((d, response))
        return d
Call the underlying AMP client, and delay the response until
dataset/ETHPy150Open ClusterHQ/flocker/flocker/testtools/amp.py/DelayedAMPClient.callRemote