@abc.abstractmethod
    def download(self, image_id, data=None):
Tests that a is not in b.  If a is in b, raise an assertion error.
dataset/ETHPy150Open openstack/ironic/ironic/common/glance_service/service.py/ImageService.download--crossover with--dataset/ETHPy150Open ga4gh/server/tests/datadriven/__init__.py/TestCase.assertNotIn