Are wrapper classes final?

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Tags

1. #cannot
2. #marking
3. #other
4. #which
5. #these
6. #future
7. #nature
8. #objects
9. #immutable
10. #change
11. #means
12. #construction
13. #class
14. #their
15. #wrapper
16. #after
17. #final
18. #developer
19. #classes
20. #string
21. #extend