Prevent rebuild costly widgets

[joaomarccos]

Is there some way to provide a animator child like in animation controller to prevent rebuild expensive widgets??

Something like:

...
return Animator(
      tween: Tween<double>(begin: 0, end: 300),
      cycles: 0,
      child: SomeCostlyOrNotWidget() // <-----
      builder: (anim, child) => Center(
            child: Container(
              margin: EdgeInsets.symmetric(vertical: 10),
              height: anim.value,
              width: anim.value,
              child: child, <--- No rebuild the entire widget
            ),
          ),
    );
...

[GIfatahTH]

final child = YourCostyWidget();

return Animator(
      tween: Tween<double>(begin: 0, end: 300),
      cycles: 0,
      child: SomeCostlyOrNotWidget() // <-----
      builder: (anim,) => Center(
            child: Container(
              margin: EdgeInsets.symmetric(vertical: 10),
              height: anim.value,
              width: anim.value,
              child: child, <--- No rebuild the entire widget
            ),
          ),
    );

[joaomarccos]

Yeah, actually I'm doing this way. But I think it should be possible directly inside the Animator Constructor.