Omnipay\Alipay\Responses\LegacyRefundResponse::getRedirectUrl PHP Метод

    public function getRedirectUrl()
    {
        /**
         * @var LegacyExpressPurchaseRequest $request
         */
        $request = $this->getRequest();
        return $request->getEndpoint() . '?' . http_build_query($this->getRedirectData());
    }