zaya-1.0.x-dev/modules/zaya_events/zaya_events.services.yml

services:
  zaya_events.chapter_completion_event_subscriber:
    class: Drupal\zaya_events\EventSubscriber\ChapterCompletionSubscriber
    tags:
      - { name: event_subscriber }
  zaya_events.resource_completion_event_subscriber:
    class: Drupal\zaya_events\EventSubscriber\ResourceCompletionSubscriber
    tags:
      - { name: event_subscriber }
  zaya_events.itinerary_completion_event_subscriber:
    class: Drupal\zaya_events\EventSubscriber\ItineraryCompletionSubscriber
    tags:
      - { name: event_subscriber }