def getInternalDate():
        """
        Retrieve the date internally associated with this message.

        @rtype: L{bytes}
        @return: An RFC822-formatted date string.
        """

        Retrieve the date internally associated with this message.

        @rtype: L{bytes}
        @return: An RFC822-formatted date string.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/interfaces.py