farm-2.x-dev/modules/core/data_stream/modules/notification/data_stream_notification.services.yml

services:
  plugin.manager.data_stream_notification_condition:
    class: Drupal\data_stream_notification\NotificationConditionManager
    parent: default_plugin_manager
  plugin.manager.data_stream_notification_delivery:
    class: Drupal\data_stream_notification\NotificationDeliveryManager
    parent: default_plugin_manager
  data_stream_notification.data_stream_event_subscriber:
    class: Drupal\data_stream_notification\EventSubscriber\DataStreamEventSubscriber
    arguments:
      [ '@entity_type.manager' ]
    tags:
      - { name: 'event_subscriber' }