def _unsupportedVersionReceived(self, remoteVersion):
        self.sendDisconnect(DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED,
            b'bad version ' + remoteVersion)
Called when an unsupported version of the ssh protocol is received from
dataset/ETHPy150Open twisted/twisted/twisted/conch/ssh/transport.py/SSHTransportBase._unsupportedVersionReceived