1. Constructors
2. new
3. assistant
4. fromJson
5. system
6. toolResult
7. user
8. Properties
9. attachments
10. content
11. hashCode
12. id
13. metadata
14. role
15. runtimeType
16. timestamp
17. toolCallId
18. toolCalls
19. Methods
20. copyWith
21. noSuchMethod
22. toJson
23. toString
24. Operators
25. operator ==