MultiStreamController<T> constructor Null safety

1. Dart
2. dart:async
3. MultiStreamController<T>
4. MultiStreamController constructor

MultiStreamController class

1. Constructors
2. MultiStreamController
3. Properties
4. done
5. hashCode
6. hasListener
7. isClosed
8. isPaused
9. onCancel
10. onListen
11. onPause
12. onResume
13. runtimeType
14. sink
15. stream
16. Methods
17. add
18. addError
19. addErrorSync
20. addStream
21. addSync
22. close
23. closeSync
24. noSuchMethod
25. toString
26. Operators
27. operator ==