def clear(self):
        super(GroupedRequirements, self).clear()
        self.create_default_groups()
def test_base_class_init_raises_error(self):
        with self.assertRaisesRegex(
            NotImplementedError,
            'Subclasses of BaseVoiceoverApplication should implement '
            '__init__.'):
            suggestion_registry.BaseVoiceoverApplication()