@classmethod
def stop_notifying(cls, user_or_email_, **filters):
    """Delete all watches matching the exact user/email and filters.

        Delete both active and inactive watches. If duplicate watches
        exist due to the get-then-create race condition, delete them all.

        Implementations in subclasses may take different arguments; see the
        docstring of :meth:`is_notifying()`.

        """
    cls._watches_belonging_to_user(user_or_email_, **filters).delete()
