1. accordion
2. accordion
3. SectionController
4. SectionController constructor

##### SectionController class

1. Constructors
2. SectionController
3. Properties
4. controller
5. hashCode
6. hasListeners
7. initialized
8. isClosed
9. isSectionOpen
10. listeners
11. onDelete
12. onStart
13. runtimeType
14. Methods
15. $configureLifeCycle
16. addListener
17. addListenerId
18. createTicker
19. dispose
20. disposeId
21. noSuchMethod
22. notifyChildrens
23. onClose
24. onInit
25. onReady
26. refresh
27. refreshGroup
28. removeListener
29. removeListenerId
30. toString
31. update
32. Operators
33. operator ==

# SectionController constructor Null safety

SectionController()