def listenSSL(self, port, factory, contextFactory, backlog=50, interface=''):
            """
            @see: twisted.internet.interfaces.IReactorSSL.listenSSL
            """
            port = self.listenTCP(
                port,
                TLSMemoryBIOFactory(contextFactory, False, factory),
                backlog, interface)
            port._type = 'TLS'
            return port

            @see: twisted.internet.interfaces.IReactorSSL.listenSSL
            
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/iocpreactor/reactor.py