def Close(self):
    _ExtStorageAction(constants.ES_ACTION_CLOSE, self.unique_id,
                      self.ext_params,
                      name=self.name, uuid=self.uuid)
produce a testcase for A->B->C inheritance with a self-referential
dataset/ETHPy150Open ganeti/ganeti/lib/storage/extstorage.py/ExtStorageDevice.Close--crossover with--dataset/ETHPy150Open zzzeek/sqlalchemy/test/orm/inheritance/test_abc_inheritance.py/produce_test