def connectionLost(self, reason):
        abstract.FileDescriptor.connectionLost(self, reason)
        self._serial.close()
        self.protocol.connectionLost(reason)
Check if the RB server supports added/deleted empty files.
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/internet/_posixserialport.py/SerialPort.connectionLost--crossover with--dataset/ETHPy150Open reviewboard/rbtools/rbtools/clients/__init__.py/SCMClient.supports_empty_files