HandlerManager::getNextFilterHandler PHP Méthode

    protected function getNextFilterHandler(Closure $next, $handler)
    {
        return function ($request, stdClass $context) use($next, $handler) {
            try {
                $result = call_user_func($handler, $request, $context, $next);
                if (class_exists("\\Generator")) {
                    return Future\co($result);
                } else {
                    return Future\toFuture($result);
                }
            } catch (Exception $e) {
                return Future\error($e);
            } catch (Throwable $e) {
                return Future\error($e);
            }
        };
    }

 protected function getNextFilterHandler(Closure $next, $handler)
 {
     if ($this->async) {
         return parent::getNextFilterHandler($next, $handler);
     }
     return function ($request, stdClass $context) use($next, $handler) {
         return call_user_func($handler, $request, $context, $next);
     };
 }