def test_immutable_dataset(self):
        self.assertRaises(
            AttributeError, setattr, self.info, "dataset", b"bar")
L{Action} can be initialized with a string version of a L{TaskLevel},
dataset/ETHPy150Open ClusterHQ/flocker/flocker/volume/test/test_filesystems_zfs.py/DatasetInfoTests.test_immutable_dataset--crossover with--dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_action.py/ActionTests.test_stringActionCompatibility