Method find

src/main/java/fieldnashorn/ErrorHelper.java:223–230

(Box origin, String uid)

	}

	private Box find(Box origin, String uid) {
		return origin.breadthFirst(origin.both())
			.filter(x -> x.properties.has(IO.id))
			.filter(x -> x.properties.get(IO.id)
				.equals(uid))
			.findFirst()
			.orElse(null);
	}

	public List<String> editsOfString(String n) {