1. Dart
2. dart:async
3. StreamController<T>
4. hasListener property

##### StreamController class

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

description

# hasListener property

bool hasListener

Whether there is a subscriber on the Stream.

## Implementation

    bool get hasListener;