Desktop wry child window support

I'm trying to do native wgpu 3d rendering. There's an example in the wry library that demonstrates how this would be possible. You can create child wry window from the parent and do the WebView rendering there while the main window supports the 3d content rendering. If the window config accepted a flag that included a parent window then it could replicate that example allowing for native 3d without waiting for blitz to become stable.