def close(self):
        if self.closed:
            return
        self._closed = True
        if self.mode in WRITE_MODES:
            backend.SaveFile(self.name, self._data)
Can give groups read permissions on a package
dataset/ETHPy150Open mockfs/mockfs/mockfs/storage.py/file.close--crossover with--dataset/ETHPy150Open mathcamp/pypicloud/tests/test_access_backends.py/TestSQLBackend.test_grant_group_read_permission