1. Dart
2. dart:core
3. Duration
4. microsecondsPerSecond constant

##### Duration class

1. Constructors
2. Duration
3. Properties
4. hashCode
5. inDays
6. inHours
7. inMicroseconds
8. inMilliseconds
9. inMinutes
10. inSeconds
11. isNegative
12. runtimeType
13. Methods
14. abs
15. compareTo
16. noSuchMethod
17. toString
18. Operators
19. operator *
20. operator +
21. operator -
22. operator <
23. operator <=
24. operator ==
25. operator >
26. operator >=
27. operator unary-
28. operator ~/
29. Constants
30. hoursPerDay
31. microsecondsPerDay
32. microsecondsPerHour
33. microsecondsPerMillisecond
34. microsecondsPerMinute
35. microsecondsPerSecond
36. millisecondsPerDay
37. millisecondsPerHour
38. millisecondsPerMinute
39. millisecondsPerSecond
40. minutesPerDay
41. minutesPerHour
42. secondsPerDay
43. secondsPerHour
44. secondsPerMinute
45. zero

description

# microsecondsPerSecond constant Null safety

int const microsecondsPerSecond

## Implementation

    static const int microsecondsPerSecond =
        microsecondsPerMillisecond * millisecondsPerSecond