ObjectManager
- [Hash] active_objects
- [Hash] known_objects
- [Array] sources
- [nil] add_source
- [nil] remove_source
- [nil] activate
- [nil] deactivate
- [Object] remove
- [Object] get
- [nil] each
- [nil] each_with_pk
- [nil] update
VehicleManager < ObjectManager
RouteManager < ObjectManager
StationManager < ObjectManager