src/Http/Client/Guzzle/RequestBuilder.php
protected function buildForVersionSix(RequestInterface $request)
    {
        if (class_exists($this->guzzlePrsRequestClass)) {
            $this->guzzleReCaptchaClient->setVersion(Version::VERSION_SIX);
            return new $this->guzzlePrsRequestClass(
                $request->getMethod(),
                (string)$request->getUri(),
                $request->getHeaders(),
                $request->getBody()
            );
        }

        return null;
    }
protected function buildForVersionSix(RequestInterface $request)
    {
        if (class_exists($this->guzzlePrsRequestClass)) {
            $this->guzzleReCaptchaClient->setVersion(Version::VERSION_SIX);
            return new $this->guzzlePrsRequestClass(
                $request->getMethod(),
                (string)$request->getUri(),
                $request->getHeaders(),
                $request->getBody()
            );
        }

        return null;
    }
Build request object for Guzzle 6.*

@param RequestInterface $request
@return mixed