code: private function callService(Request $request, ParamConverter $configuration)
      {
          $options = $configuration->getOptions();
          $callable = $this->getCallable($options);
  
          return call_user_func_array($callable, $this->extractArguments($request, $options));
      }
docs: @param Request        $request
  @param ParamConverter $configuration
  
  @return mixed