message_thread-8.x-1.x-dev/message_thread.services.yml

services:
  message_thread.breadcrumbs:
    class: Drupal\message_thread\Plugin\Breadcrumbs\MessageThreadBreadcrumbs
    tags:
      - { name: breadcrumb_builder, priority: 1020 }

  message.statistics:
    class: Drupal\message_thread\MessageStatistics
    arguments: ['@database', '@current_user', '@entity.manager', '@state']
    tags:
      - { name: backend_overridable }