LanguageService constructor Null safety

1. irte_engine
2. language_service
3. LanguageService
4. LanguageService constructor

LanguageService class

1. Constructors
2. LanguageService
3. Properties
4. hashCode
5. initialized
6. isClosed
7. onDelete
8. onStart
9. runtimeType
10. Methods
11. $configureLifeCycle
12. noSuchMethod
13. onClose
14. onInit
15. onReady
16. toString
17. Operators
18. operator ==
19. Static properties
20. defaultLanguage
21. defaultLocale
22. defaultRegion
23. deviceLocale
24. localeMap
25. supportedLocales
26. Static methods
27. isSupportedLocale
28. localeFor
29. parseLocaleMap
30. updateLocales
31. Constants
32. fallbackLocale