def writeConnectionLost():
        """
        Notification of the write connection being closed.

        This will never be called for TCP connections as TCP does not
        support notification of this type of half-close.
        """

        Notification of the write connection being closed.

        This will never be called for TCP connections as TCP does not
        support notification of this type of half-close.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/interfaces.py