def gotServerVersion(self, serverVersion, extData):
        """
        Called when the client sends their version info.

        @param otherVersion: an integer representing the version of the SFTP
        protocol they are claiming.
        @param extData: a dictionary of extended_name : extended_data items.
        These items are sent by the client to indicate additional features.
        """

        Called when the client sends their version info.

        @param otherVersion: an integer representing the version of the SFTP
        protocol they are claiming.
        @param extData: a dictionary of extended_name : extended_data items.
        These items are sent by the client to indicate additional features.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/ssh/filetransfer.py