def _connectionMade(self, protocol):
        """
        A connection has been made.

        @param protocol: The protocol of the connection.
        @type protocol: L{IProtocol}
        """

        A connection has been made.

        @param protocol: The protocol of the connection.
        @type protocol: L{IProtocol}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/application/internet.py