1. Dart
2. dart:html
3. PerformanceLongTaskTiming
4. attribution property

##### PerformanceLongTaskTiming class

1. Properties
2. attribution
3. duration
4. entryType
5. hashCode
6. name
7. runtimeType
8. startTime
9. Methods
10. noSuchMethod
11. toString
12. Operators
13. operator ==

description

# attribution property Null safety

List<TaskAttributionTiming>? attribution

## Implementation

    List<TaskAttributionTiming>? get attribution native;