gistfile1.txt

// match method becomes

    public function matchRequest(Request $request)
    {
        $defaults = $this->nestedMatcher->matchRequest($request);
        
        foreach ($this->enhancers as $enhancer) {
            $defaults = $enhancer->enhance($defaults, $request);
        }
        return $defaults;
    }

interface RouteEnhancerInterface
{
    /**
     * Change the defaults based on rules.
     *
     * @return array the modified defaults
     */
    public function enhance(array $defaults, Request $request);
}