static final public Map mapOf(Object... objs) {
        HashMap<Object, Object> m = new HashMap<>();

        for (int i = 0; i < objs.length; i += 2) {
			Object key = objs[i];
			if (i + 1 < objs.length) {
				Object value = objs[i + 1];
				m.put(key, value);
			} else {
				m.put(key, null);
			}
		}
		return m;
    }