Question from the PHP7 test

What design pattern would allow me to use Symfony \ Component \ HttpFoundation \ Request and Symfony \ Component \ HttpFoundation \ Response on an object that respects the following interface:

<?php
interface Middleware
{
    public function __invoke(
        Psr\Http\Message\ServerRequestInterface $request,
        Psr\Http\Message\ResponseInterface $response,
        callable $next= null
    ): Psr\Http\Message\ResponseInterface;
}