private_page-8.x-1.0-alpha1/private_page.services.yml

services:
  access_check.private_page:
    class: Drupal\private_page\Access\PrivatePageAccessCheck
    # arguments: ['@current_user', '@current_route_match']
    tags:
      - { name: access_check, applies_to: _private_page, priority: 0 }
  private_page.route_subscriber:
    class: Drupal\private_page\Routing\PrivatePageRouteSubscriber
    tags:
      - { name: event_subscriber }