1. Constructors
2. GroupRecvMsgOpt
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static properties
12. MSG_REMIND_ACPT_AND_NOTE
13. MSG_REMIND_ACPT_NOT_NOTE
14. MSG_REMIND_DISCARD
15. Static methods
16. convertMsgRecvOpt
17. convertMsgRecvOptToWeb