Omnipay\PayPal\Message\RestTokenRequest::sendData PHP Метод

    public function sendData($data)
    {
        // don't throw exceptions for 4xx errors
        $this->httpClient->getEventDispatcher()->addListener('request.error', function ($event) {
            if ($event['response']->isClientError()) {
                $event->stopPropagation();
            }
        });
        $httpRequest = $this->httpClient->createRequest($this->getHttpMethod(), $this->getEndpoint(), array('Accept' => 'application/json'), $data);
        $httpResponse = $httpRequest->setAuth($this->getClientId(), $this->getSecret())->send();
        // Empty response body should be parsed also as and empty array
        $body = $httpResponse->getBody(true);
        $jsonToArrayResponse = !empty($body) ? $httpResponse->json() : array();
        return $this->response = new RestResponse($this, $jsonToArrayResponse, $httpResponse->getStatusCode());
    }