def test_init(self):
        container = Container(name='a container', description='this is a test')
        self.assertEqual(container.name, 'a container')
        self.assertEqual(container.description, 'this is a test')
        self.assertEqual(container.file_origin, None)
Downgrades the assets db at the given engine to the desired version.
dataset/ETHPy150Open NeuralEnsemble/python-neo/neo/test/coretest/test_container.py/TestContainerNeo.test_init--crossover with--dataset/ETHPy150Open quantopian/zipline/zipline/assets/asset_db_migrations.py/downgrade