case DNR:
case NN_DNR:
	public String toString() {		String pfx = "";		if (DEBUG_EXCEPTION) {			pfx = (kind & EXCEPTION) != 0 ? "e" : "_";		}		switch (kind & ~EXCEPTION) {		case NULL:			return pfx + "n";		case CHECKED_NULL:			return pfx + "w";		case NN:			return pfx + "N";		case CHECKED_NN:			return pfx + "W";		case NSP:			return pfx + "s";		case DNR:			return pfx + "-";		default:			throw new IllegalStateException("unknown kind of IsNullValue: " + kind);		}	}