networking/managers/device_manager library

1. appfit
2. networking/managers/device_manager.dart

appfit package

1. Libraries
2. errors/app_it_error
3. appfit
4. appfit_configuration
5. appfit_event
6. networking/properties/browser_properties
7. networking/managers/device_manager
8. networking/properties/device_properties
9. networking/properties/event_system_properties
10. networking/properties/operating_system/operating_system
11. networking/properties/operating_system/operating_system_name
12. networking/properties/operating_system/operating_system_name_detector
13. networking/properties/operating_system/operating_system_name_detector_web
14. networking/managers/system_manager