Symfony\Component\HttpKernel\Client::doRequest PHP Method

    protected function doRequest($request)
    {
        $response = $this->kernel->handle($request);

        if ($this->kernel instanceof TerminableInterface) {
            $this->kernel->terminate($request, $response);
        }

        return $response;
    }

 protected function doRequest($request)
 {
     if ($this->credentials !== null) {
         $request->attributes->set('indieauth.client.token', $this->credentials);
     }
     return parent::doRequest($request);
 }