long days = duration.toDays();
        long hours = duration.toHoursPart();
        long minutes = duration.toMinutesPart();
        long seconds = duration.toSecondsPart();
        long millis = duration.toMillisPart();

        if (days > 0) {
            return String.format("%d d %02d:%02d h", days, hours, minutes);
        } else if (hours > 0) {