def _IdCounter(self, id_space):
    return self.__id_counters[id_space]
This method create shadow table for table with name ``table_name``
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/api/datastore_file_stub.py/DatastoreFileStub._IdCounter--crossover with--dataset/ETHPy150Open openstack/rack/rack/db/sqlalchemy/utils.py/create_shadow_table