@property
    def _data_stub(self):
        if self._data_stub_internal is None:
            raise ValueError('Client has not been started.')
        return self._data_stub_internal
Returns a ``type`` subclass that may be used as a metaclass for
dataset/ETHPy150Open GoogleCloudPlatform/gcloud-python/gcloud/bigtable/client.py/Client._data_stub--crossover with--dataset/ETHPy150Open ARM-software/workload-automation/wlauto/utils/misc.py/enum_metaclass