public function onRouteBuildAlter(RouteBuildEvent $event) {
    $collection = $event->getRouteCollection();
    array_walk(static::$disabledRoutes, function ($disabledRouteName) use ($collection) {
      if ($route = $collection->get($disabledRouteName)) {
        $route->setRequirement('_access', 'FALSE');
      }
    });
  }