public function handle(ServerRequestInterface $request): ResponseInterface
    {
        $response = call_user_func($this->callback, $request);
        return $response;
    }
public function handle(ServerRequestInterface $request): ResponseInterface
    {
        $response = call_user_func($this->callback, $request);
        return $response;
    }
public function handle ( ServerRequestInterface $ request ) : ResponseInterface { $ response = call_user_func ( $ this -> callback , $ request ) ; return $ response ; }
Handle the request and return a response.

@param ServerRequestInterface $request

@return ResponseInterface
Handle the request and return a response .