farm-2.x-dev/modules/core/map/modules/mapbox/farm_map_mapbox.services.yml

services:
  mapbox_map_render_event_subscriber:
    class: Drupal\farm_map_mapbox\EventSubscriber\MapRenderEventSubscriber
    arguments:
      - '@config.factory'
    tags:
      - { name: 'event_subscriber' }