RouterTestServiceProvider.php

<?php

namespace Drupal\router_test;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\DependencyInjection\ServiceProviderInterface;

/**
 * Registers a dynamic route provider.
 */
class RouterTestServiceProvider implements ServiceProviderInterface {
    
    /**
     * {@inheritdoc}
     */
    public function register(ContainerBuilder $container) {
        $container->register('router_test.subscriber', 'Drupal\\router_test\\RouteTestSubscriber')
            ->addTag('event_subscriber');
        $container->register('access_check.router_test', 'Drupal\\router_test\\Access\\TestAccessCheck')
            ->addTag('access_check', [
            'applies_to' => '_access_router_test',
        ]);
        $container->register('router_test.early_exception.subscriber', 'Drupal\\router_test\\RouterTestEarlyExceptionSubscriber')
            ->addTag('event_subscriber');
    }

}