def __iter__(self):
    return iter(self._data)
Constructs a base class for tests that verify the implementation of
dataset/ETHPy150Open GoogleCloudPlatform/endpoints-proto-datastore/endpoints_proto_datastore/utils.py/MessageFieldsSchema.__iter__--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/make_createblockdevicedataset_mixin