App\Ninja\Import\BaseTransformer::getInvoiceId PHP Метод

    protected function getInvoiceId($invoiceNumber)
    {
        $invoiceNumber = $this->getInvoiceNumber($invoiceNumber);
        return isset($this->maps[ENTITY_INVOICE][$invoiceNumber]) ? $this->maps[ENTITY_INVOICE][$invoiceNumber] : null;
    }