def test_unavailableReceivedEmptySender(self):
        self._testPresence(sender='', available=False)
Given a column type (e.g. 'BLOB', 'VARCHAR'), returns the SQL necessary
dataset/ETHPy150Open ralphm/wokkel/wokkel/test/test_muc.py/MUCClientTest.test_unavailableReceivedEmptySender--crossover with--dataset/ETHPy150Open dcramer/django-compositepks/django/db/backends/__init__.py/BaseDatabaseOperations.field_cast_sql