pub fn take_render_backend(world: &mut World) -> Option<Box<dyn RenderBackend>>Expand description
Take the live render backend out of the world’s parked slot, leaving the
world backend-less. The cn editor live SAVE swap transplants it into the
rebuilt world (via a PendingBackend resource) so the edit applies without
recreating the OS window / re-initialising the GPU device. None when the
world never built a backend (or it was already yielded).