NIMChatroomNotificationTypes constructor Null safety

1. nim_core
2. nim_core
3. NIMChatroomNotificationTypes
4. NIMChatroomNotificationTypes constructor

NIMChatroomNotificationTypes class

1. Constructors
2. NIMChatroomNotificationTypes
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. typeToString
13. Constants
14. chatRoomClose
15. chatRoomCommonAdd
16. chatRoomCommonRemove
17. chatRoomInfoUpdated
18. chatRoomManagerAdd
19. chatRoomManagerRemove
20. chatRoomMemberBlackAdd
21. chatRoomMemberBlackRemove
22. chatRoomMemberExit
23. chatRoomMemberIn
24. chatRoomMemberKicked
25. chatRoomMemberMuteAdd
26. chatRoomMemberMuteRemove
27. chatRoomMemberTempMuteAdd
28. chatRoomMemberTempMuteRemove
29. chatRoomMyRoomRoleUpdated
30. chatRoomQueueBatchChange
31. chatRoomQueueChange
32. chatRoomRoomDeMuted
33. chatRoomRoomMuted