def corofunc2():
            called[1] += 1
            return event.ReturnValue(insert_events=[evt3], append_events=[evt2])
def test_base_class_get_change_list_for_accepting_suggestion_raises_error(
            self):
        with self.assertRaisesRegex(
            NotImplementedError,
            'Subclasses of BaseSuggestion should implement '
            'get_change_list_for_accepting_suggestion.'):
            self.base_suggestion.get_change_list_for_accepting_suggestion()