ChatListSubScreenVM constructor Null safety

1. farmershands
2. chat_list_subscreen_vm
3. ChatListSubScreenVM
4. ChatListSubScreenVM constructor

ChatListSubScreenVM class

1. Constructors
2. ChatListSubScreenVM
3. Properties
4. chatMessages
5. currentTextFieldLines
6. hashCode
7. hasListeners
8. isLoading
9. runtimeType
10. scrollController
11. textEditingController
12. Methods
13. addChatMessage
14. addListener
15. dispose
16. fetchChatMessages
17. init
18. noSuchMethod
19. notifyListeners
20. removeListener
21. toString
22. Operators
23. operator ==