def copy(self, new_rcpts=None):
        new_env = copy.deepcopy(self)
        if new_rcpts:
            new_env.recipients = new_rcpts
        return new_env
Return ``lastrow_has_defaults()`` from the underlying
dataset/ETHPy150Open slimta/python-slimta/slimta/envelope.py/Envelope.copy--crossover with--dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/engine/result.py/ResultProxy.lastrow_has_defaults