1. Dart
2. dart:core
3. Stopwatch
4. isRunning property

Stopwatch class

1. Constructors
2. Stopwatch
3. Properties
4. elapsed
5. elapsedMicroseconds
6. elapsedMilliseconds
7. elapsedTicks
8. frequency
9. hashCode
10. isRunning
11. runtimeType
12. Methods
13. noSuchMethod
14. reset
15. start
16. stop
17. toString
18. Operators
19. operator ==

bool get isRunning => _stop == null;