/**
* On delete of a Content or ContentAddon
*
* @param \yii\base\Event $event
*/
public static function onContentDelete($event)
{
models\Mentioning::deleteAll(['object_model' => $event->sender->className(), 'object_id' => $event->sender->getPrimaryKey()]);
models\Follow::deleteAll(['object_model' => $event->sender->className(), 'object_id' => $event->sender->getPrimaryKey()]);
}
