schemadotorg_demo-1.0.x-dev/modules/schemadotorg_demo_admin/schemadotorg_demo_admin.services.yml

services:
  schemadotorg_demo_admin.route_subscriber:
    class: \Drupal\schemadotorg_demo_admin\Routing\SchemaDotOrgDemoAdminSubscriber
    tags:
      - { name: event_subscriber }