def METHOD_NAME(sender, user, obj, mentions, **kwargs):
    event_type = choices.WebNotificationType.mentioned_in_comment
    data = {
        "project": obj.project,
        "user": user,
        "obj": obj,
    }
    recipients = _filter_recipients(obj.project, user,
                                    [user.id for user in mentions])
    _push_to_web_notifications(event_type, data, recipients)