class RouteSubscriber

class RouteSubscriber extends RouteSubscriberBase {
    
    /**
     * The mapper plugin discovery service.
     *
     * @var \Drupal\config_translation\ConfigMapperManagerInterface
     */
    protected $mapperManager;
    
    /**
     * Constructs a new RouteSubscriber.
     *
     * @param \Drupal\config_translation\ConfigMapperManagerInterface $mapper_manager
     *   The mapper plugin discovery service.
     */
    public function __construct(ConfigMapperManagerInterface $mapper_manager) {
        $this->mapperManager = $mapper_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function alterRoutes(RouteCollection $collection) {
        $mappers = $this->mapperManager
            ->getMappers($collection);
        foreach ($mappers as $mapper) {
            $collection->add($mapper->getOverviewRouteName(), $mapper->getOverviewRoute());
            $collection->add($mapper->getAddRouteName(), $mapper->getAddRoute());
            $collection->add($mapper->getEditRouteName(), $mapper->getEditRoute());
            $collection->add($mapper->getDeleteRouteName(), $mapper->getDeleteRoute());
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function getSubscribedEvents() : array {
        // Come after field_ui.
        $events[RoutingEvents::ALTER] = [
            'onAlterRoutes',
            -110,
        ];
        return $events;
    }

}