app\models\Invoice::isType PHP Метод

    public function isType($typeId)
    {
        return $this->invoice_type_id == $typeId;
    }

 /**
  * @param Invoice $invoice
  * @return string
  */
 private function entityViewedMessage(Invoice $invoice)
 {
     if ($invoice->isType(INVOICE_TYPE_QUOTE)) {
         return trans('texts.notification_quote_viewed_subject', ['invoice' => $invoice->invoice_number, 'client' => $invoice->client->name]);
     } else {
         return trans('texts.notification_invoice_viewed_subject', ['invoice' => $invoice->invoice_number, 'client' => $invoice->client->name]);
     }
 }