public function getAllOffline($limit = 0, $start = 0, $categoryid = -1, $sort = 'datesub', $order = 'DESC', $notNullFields = '', $asObject = true, $idKey = 'none')
    {
        return $this->getItems($limit, $start, [Constants::PUBLISHER_STATUS_OFFLINE], $categoryid, $sort, $order, $notNullFields, $asObject, null, $idKey);
    }