def __init__(self, server):
        """
        @param server: An L{IProtocol} provider to which the client will be
            connected.
        @type server: L{IProtocol} provider
        """
        self.pump = None
        self._server = server

        @param server: An L{IProtocol} provider to which the client will be
            connected.
        @type server: L{IProtocol} provider
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/test/test_endpoints.py