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. isRunning
10. hashCode
11. runtimeType
12. Methods
13. reset
14. start
15. stop
16. noSuchMethod
17. toString
18. Operators
19. operator ==

bool get isRunning => _stop == null;