* @param durationMillis the duration in milliseconds
     * @return formatted duration string (e.g., "2 days 14:30:25.123" or "14:30:25.123")
     */
    public static String formatDuration(final long durationMillis) {
        return DurationFormatUtils.formatDuration(durationMillis, "d 'days' HH:mm:ss.SSS").replace("0 days", StringUtil.EMPTY).trim();

    }

    /**
     * Formats a number using the specified pattern and user's locale.