RouteSubscriber.php

<?php

namespace Drupal\path\Routing;

use Drupal\Core\Routing\BcRoute;
use Drupal\Core\Routing\RouteBuildEvent;
use Drupal\Core\Routing\RoutingEvents;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

/**
 * Provides backwards-compatible routes for the path module.
 */
class RouteSubscriber implements EventSubscriberInterface {
    
    /**
     * Provides routes on route rebuild time.
     *
     * @param \Drupal\Core\Routing\RouteBuildEvent $event
     *   The route build event.
     */
    public function onDynamicRouteEvent(RouteBuildEvent $event) {
        $route_collection = $event->getRouteCollection();
        $route_collection->add('path.admin_add', new BcRoute());
        $route_collection->add('path.admin_edit', new BcRoute());
        $route_collection->add('path.delete', new BcRoute());
        $route_collection->add('path.admin_overview', new BcRoute());
        $route_collection->add('path.admin_overview_filter', new BcRoute());
    }
    
    /**
     * {@inheritdoc}
     */
    public static function getSubscribedEvents() {
        $events[RoutingEvents::DYNAMIC][] = [
            'onDynamicRouteEvent',
            0,
        ];
        return $events;
    }

}