Apply any necessary post-save moderation steps to new
        comments.

def post_save_moderation(self, sender, comment, request, **kwargs):
        """
        Apply any necessary post-save moderation steps to new
        comments.

        """
        model = comment.content_type.model_class()
        if model not in self._registry:
            return
        self._registry[model].email(comment, comment.content_object, request)