UserDataModel constructor Null safety

1. f_redditech
2. qwiddo
3. UserDataModel
4. UserDataModel constructor

UserDataModel class

1. Constructors
2. UserDataModel
3. Properties
4. hashCode
5. hasListeners
6. runtimeType
7. userData
8. Methods
9. addListener
10. addUserDatas
11. clearPostTileList
12. dispose
13. noSuchMethod
14. notifyListeners
15. removeListener
16. setPostList
17. toString
18. Operators
19. operator ==