1. Constructors
2. new
3. Properties
4. allowMultiple
5. hashCode
6. initialExpanded
7. items
8. key
9. runtimeType
10. Methods
11. asFocusable ^(ext)
12. asSemanticButton ^(ext)
13. asSemanticHeading ^(ext)
14. createElement
15. createState
16. debugDescribeChildren
17. debugFillProperties
18. excludeFromSemantics ^(ext)
19. mergeSemantics ^(ext)
20. noSuchMethod
21. toDiagnosticsNode
22. toString
23. toStringDeep
24. toStringShallow
25. toStringShort
26. withSemanticLabel ^(ext)
27. Operators
28. operator ==