def test_empty(self):
        return self.assertResult(
            b"GET", b"/configuration/containers", None, OK, []
        )
Returns a short string representing the permission bits.  Looks like
dataset/ETHPy150Open ClusterHQ/flocker/flocker/control/test/test_httpapi.py/GetContainerConfigurationTestsMixin.test_empty--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/filepath.py/RWX.shorthand