event_platform-1.0.x-dev/event_platform_details/event_platform_details.services.yml

services:
  event_platform_details.event_helper:
    class: Drupal\event_platform_details\EventHelper
  cache_context.sessions_open:
    class: Drupal\event_platform_details\Cache\Context\SessionsOpen
    tags:
      - { name: cache.context }
  event_platform_details.access_policy.sessions_open:
    class: Drupal\event_platform_details\Access\SessionsOpenAccessPolicy
    tags:
      - { name: access_policy }