Method initialize

src/main/java/fieldbox/boxes/Box.java:331–337

()

		return new Lazy<Box>() {
			LinkedHashSet<Box> ret = null;
			Set<Box> thisLevel = null;

			protected Iterator<Box> initialize() {

				ret = new LinkedHashSet<>();
				ret.add(Box.this);
				thisLevel = ret;
				return ret.iterator();
			}