def destroy():
        """
        Called before this mailbox is deleted, permanently.

        If necessary, all resources held by this mailbox should be cleaned up
        here. This function _must_ set the \\Noselect flag on this mailbox.
        """

        Called before this mailbox is deleted, permanently.

        If necessary, all resources held by this mailbox should be cleaned up
        here. This function _must_ set the \Noselect flag on this mailbox.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/interfaces.py