createRectTween property
Defines how the destination hero's bounds change as it flies from the starting route to the destination route.
A hero flight begins with the destination hero's child
aligned with the
starting hero's child. The Tween<Rect> returned by this callback is used
to compute the hero's bounds as the flight animation's value goes from 0.0
to 1.0.
If this property is null, the default, then the value of HeroController.createRectTween is used. The HeroController created by MaterialApp creates a MaterialRectArcTween.
Implementation
final CreateRectTween? createRectTween;