Phlyty\Route::respondsTo PHP Method

    public function respondsTo($method = null)
    {
        if (null === $method) {
            return array_keys($this->methods);
        }
        $method = strtoupper($method);
        return isset($this->methods[$method]);
    }

 /**
  * Determine what methods a route responds to
  *
  * @param  Route $route
  * @param  int   $index
  */
 protected function registerRouteMethods(Route $route, $index)
 {
     foreach ($route->respondsTo() as $method) {
         if (!isset($this->routesByMethod[$method])) {
             $this->routesByMethod[$method] = [];
         }
         $this->routesByMethod[$method][$index] = $route;
     }
 }