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

services:
  farm_map.map_render_event_subscriber:
    class: Drupal\farm_map\EventSubscriber\MapRenderEventSubscriber
    arguments:
      - '@config.factory'
    tags:
      - { name: 'event_subscriber' }
  farm_map.layer_style_loader:
    class: Drupal\farm_map\LayerStyleLoader