def undeleteMessages():
        """
        Undelete all messages marked for deletion.

        Any message which can be undeleted should be returned to its original
        position in the message sequence and retain its original UID.
        """

        Undelete all messages marked for deletion.

        Any message which can be undeleted should be returned to its original
        position in the message sequence and retain its original UID.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/interfaces.py