Iyzipay\Request\RetrievePaymentRequest::toPKIRequestString PHP Метод

    public function toPKIRequestString()
    {
        return RequestStringBuilder::create()->appendSuper(parent::toPKIRequestString())->append("paymentId", $this->getPaymentId())->append("paymentConversationId", $this->getPaymentConversationId())->getRequestString();
    }