1. Flutter
2. painting
3. FractionalOffset
4. operator - method

FractionalOffset class

1. Constructors
2. FractionalOffset
3. fromOffsetAndRect
4. fromOffsetAndSize
5. Properties
6. dx
7. dy
8. hashCode
9. runtimeType
10. x
11. y
12. Methods
13. toString
14. add
15. alongOffset
16. alongSize
17. inscribe
18. noSuchMethod
19. resolve
20. withinRect
21. Operators
22. operator %
23. operator *
24. operator +
25. operator -
26. operator /
27. operator unary-
28. operator ~/
29. operator ==
30. Static methods
31. lerp
32. Constants
33. bottomCenter
34. bottomLeft
35. bottomRight
36. center
37. centerLeft
38. centerRight
39. topCenter
40. topLeft
41. topRight

@override
Alignment operator -(Alignment other) {
  if (other is! FractionalOffset)
    return super - other;
  final FractionalOffset typedOther = other as FractionalOffset;
  return FractionalOffset(dx - typedOther.dx, dy - typedOther.dy);
}