1. Dart
2. dart:math
3. Rectangle<T extends num>
4. topLeft property

Rectangle class

1. Constructors
2. Rectangle
3. fromPoints
4. Properties
5. height
6. left
7. top
8. width
9. bottom
10. bottomLeft
11. bottomRight
12. hashCode
13. right
14. runtimeType
15. topLeft
16. topRight
17. Methods
18. boundingBox
19. containsPoint
20. containsRectangle
21. intersection
22. intersects
23. noSuchMethod
24. toString
25. Operators
26. operator ==

Point<T> get topLeft => Point<T>(this.left, this.top);