def attach_alternative(self, content, mimetype):
        assert content is not None
        assert mimetype is not None
        self.alternatives.append((content, mimetype))
Remove the cached reference.
dataset/ETHPy150Open CollabQ/CollabQ/vendor/django/core/mail.py/EmailMultiAlternatives.attach_alternative--crossover with--dataset/ETHPy150Open evennia/evennia/evennia/utils/idmapper/models.py/SharedMemoryModel._flush_cached_by_key