public function printResponse()
    {
        $request = $this->request;
        $response = $this->response;

        echo sprintf(
            "%s %s => %d:\n%s",
            $request->getMethod(),
            (string) ($request instanceof RequestInterface ? $request->getUri() : $request->getUrl()),
            $response->getStatusCode(),
            (string) $response->getBody()
        );
    }