@property
    def dsr(self):
        if not self.is_open:
            raise portNotOpenError
        if self.logger:
            self.logger.info('returning dummy for dsr')
        return True
Call the underlying AMP client, and delay the response until
dataset/ETHPy150Open pyserial/pyserial/serial/urlhandler/protocol_socket.py/Serial.dsr--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/testtools/amp.py/DelayedAMPClient.callRemote