def fileno(self):
        return self._fileno
``POST`` to remove multiple messages
dataset/ETHPy150Open mockfs/mockfs/mockfs/storage.py/file.fileno--crossover with--dataset/ETHPy150Open bread-and-pepper/django-userena/userena/contrib/umessages/tests/test_views.py/MessagesViewsTests.test_valid_message_remove_multiple