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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 stop(self):
 """Stop the server and teardown any remaining clients. If your subclass overrides this method, make sure to call super().stop() to ensure that all devices with open connections from thie server are properly closed. See :meth:`AbstractDeviceServer.stop`. """


        clients = list(self._clients)

        for client in clients:
            self._logger.info("Tearing down client %s at server stop()", client)
            await self.teardown_client(client)