void addChildScene({Offset offset: Offset.zero, double devicePixelRatio: 1.0, int physicalWidth: 0, int physicalHeight: 0, int sceneToken, bool hitTestable: true })

(Fuchsia-only) Adds a scene rendered by another application to the scene for this application.

Applications typically obtain scene tokens when embedding other views via the Fuchsia view manager, but this function is agnostic as to the source of scene token.

Source 

void addChildScene({
  Offset offset: Offset.zero,
  double devicePixelRatio: 1.0,
  int physicalWidth: 0,
  int physicalHeight: 0,
  int sceneToken,
  bool hitTestable: true
}) {
  _addChildScene(offset.dx,
                 offset.dy,
                 devicePixelRatio,
                 physicalWidth,
                 physicalHeight,
                 sceneToken,
                 hitTestable);
}