Scene constructor
Scene()
Implementation
Scene() {
// Kicked off, not awaited: rendering is gated on isReadyToRender, and a
// SceneView shows its loadingBuilder until then. initializeStaticResources
// completes with its error for callers that do await it, and has already
// logged the failure by the time this handler runs, so this only keeps an
// unawaited future from being reported a second time as an unhandled error.
initializeStaticResources().ignore();
root.registerAsRoot(this);
}