Method frameModified

src/main/java/fieldbox/boxes/Callbacks.java:110–119

(Box b, Consumer<Rect> r)

		return thread(from, a, onFrameChanged);
	}

	//todo: generalize
	static public void frameModified(Box b, Consumer<Rect> r) {
		Rect rect = b.properties.get(Box.frame);
		Rect r2 = rect.duplicate();
		r.accept(r2);

		Rect r3 = Callbacks.frameChange(b, r2);

		b.properties.put(Box.frame, r3);

	}