private static void visitHourToken(int repetitions, JQueryDateTimePatternBuilder builder) {
        if (repetitions == 1) {
            builder.appendHourNoLeadingZeros();
        }
        else {
            builder.appendHourWithLeadingZeros();
        }
    }
Full-hour (0-23) token 'H' and 'HH'. 'H' is the hour without leading zeros,
more than one 'H' is the hour with leading zeros.
primefaces/src/main/java/org/primefaces/convert/CombinedDateTimePatternTokenVisitor.java