drupal/core/modules/system/system.services.yml

services:
  access_check.cron:
    class: Drupal\system\Access\CronAccessCheck
    tags:
      - { name: access_check, applies_to: _access_system_cron }
  access_check.db_update:
    class: Drupal\system\Access\DbUpdateAccessCheck
    tags:
      - { name: access_check, applies_to: _access_system_update }
  system.manager:
    class: Drupal\system\SystemManager
    arguments: ['@module_handler', '@entity.manager', '@request_stack', '@menu.link_tree', '@menu.active_trail']
  system.breadcrumb.default:
    class: Drupal\system\PathBasedBreadcrumbBuilder
    arguments: ['@router.request_context', '@access_manager', '@router', '@path_processor_manager', '@config.factory',  '@title_resolver', '@current_user', '@path.current']
    tags:
      - { name: breadcrumb_builder, priority: 0 }
  path_processor.files:
    class: Drupal\system\PathProcessor\PathProcessorFiles
    tags:
      - { name: path_processor_inbound, priority: 200 }
  system.admin_path.route_subscriber:
    class: Drupal\system\EventSubscriber\AdminRouteSubscriber
    tags:
      - { name: event_subscriber }
  theme.negotiator.system.batch:
    class: Drupal\system\Theme\BatchNegotiator
    arguments: ['@batch.storage', '@request_stack']
    tags:
      - { name: theme_negotiator, priority: 1000 }
  theme.negotiator.system.db_update:
    class: Drupal\system\Theme\DbUpdateNegotiator
    arguments: ['@config.factory']
    tags:
      - { name: theme_negotiator, priority: 100 }
  system.config_subscriber:
    class: Drupal\system\SystemConfigSubscriber
    tags:
      - { name: event_subscriber }
  system.automatic_cron:
    class: Drupal\system\EventSubscriber\AutomaticCron
    arguments: ['@cron', '@config.factory', '@state']
    tags:
      - { name: event_subscriber }
  system.config_cache_tag:
    class: Drupal\system\EventSubscriber\ConfigCacheTag
    arguments: ['@theme_handler', '@cache_tags.invalidator']
    tags:
      - { name: event_subscriber }