Method getOr

src/main/java/field/utility/Dict.java:458–462

(Prop<T> key, Supplier<T> def)

	}

	public <T> T getOr(Prop<T> key, Supplier<T> def) {
		T t = get(key);
		if (t == null) return def.get();
		return t;
	}

	public <T> T computeIfAbsent(Prop<T> k, Function<Prop<T>, T> def) {