Which class should be used to indicate a button group?

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Tags

1. #buttons
2. #checkbox
3. #style
4. #basic
5. #behavior
6. #button
7. #class
8. #optional
9. #series
10. #radio
11. #plugin
12. #javascript
13. #group
14. #complex
15. #bootstrap
16. #components
17. #helps
18. #combine
19. #toolbar