def clear(self):
        super(GroupedRequirements, self).clear()
        self.create_default_groups()
def execute(self, sql, params=None):
        result = self._no_monkey.execute(self, sql, params)
        if transaction_states[self.db.alias] and is_sql_dirty(sql):
            transaction_states[self.db.alias].mark_dirty()
        return result