gcommerce-8.x-1.0-beta5/modules/gcommerce_promotion/gcommerce_promotion.services.yml

services:
  gcommerce_promotion.route_subscriber:
    class: 'Drupal\gcommerce_promotion\Routing\RouteSubscriber'
    tags:
      - { name: 'event_subscriber' }

  group.relation_handler.permission_provider.group_promotion:
    class: 'Drupal\gcommerce_promotion\Plugin\Group\RelationHandler\GroupPromotionPermissionProvider'
    arguments: ['@group.relation_handler.permission_provider']
    shared: false