1. Constructors
2. GroupAddOptTypeEnum
3. Values
4. V2TIM_GROUP_ADD_FORBID
5. V2TIM_GROUP_ADD_AUTH
6. V2TIM_GROUP_ADD_ANY
7. Properties
8. hashCode
9. index
10. runtimeType
11. Methods
12. noSuchMethod
13. toString
14. Operators
15. operator ==
16. Constants
17. values