RenderObject "Hello World" not visible

[renlite]

Hi!
Not to need VS and all the C++ SDK to compile/build Flutter apps for Windows is lightweight .

I tried to execute the RenderObject based SampleCode

https://github.com/renlite/relflor/blob/master/render_sample_hello/lib/main.dart

with win32_runner, but got an empty window. Does it only work with widget_tree?

The compilition of the flutter app seems not to use IC. Will this change?
C:\src\simpleapp> flutter assemble -dTargetPlatform=windows-x64 --output=build -dBuildMode=release release_bundle_windows_assets

[renlite]

I changed the first frame drawing in
https://github.com/renlite/relflor/blob/master/render_sample_hello/lib/main.dart
Now Skia renders.

IC (incremental compilation of flutter assemble ...) issue is still open.