RenderObjectからlocalToGlobalがない

Flutter2のせいか？

これはlocalToGlobalがない

final box = globalKey.currentContext!
                              .findRenderObject();
box!.localToGlobal(Offset.zero);

https://github.com/flutter/flutter/issues/61124

as RenderBoxをする

final box = globalKey.currentContext!
                              .findRenderObject() as RenderBox;