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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 async def close(self, *args, _conn=None, **kwargs):
 """ Perform any resource clean up necessary to exit the program safely. After closing, cmd execution is still possible but you will have to close again before exiting. :raises: :class:`asyncio.TimeoutError` if it lasts more than self.timeout """

        start = time.monotonic()
        ret = await self._close(*args, _conn=_conn, **kwargs)
        logger.debug("CLOSE (%.4f)s", time.monotonic() - start)
        return ret