Parameter type is already known to be 'ChronoField'. There is no sense to use instanceof check.

    public ValueRange range(ChronoField field) {
        checkCalendarInit();
        if (field instanceof ChronoField) {
            ChronoField f = field;
            return switch (f) {
                case DAY_OF_MONTH -> ValueRange.of(1, 1, getMinimumMonthLength(), getMaximumMonthLength());
                case DAY_OF_YEAR -> ValueRange.of(1, getMaximumDayOfYear());
                case ALIGNED_WEEK_OF_MONTH -> ValueRange.of(1, 5);
                case YEAR, YEAR_OF_ERA -> ValueRange.of(getMinimumYear(), getMaximumYear());
                case ERA -> ValueRange.of(1, 1);
                default -> field.range();
            };
        }
        return field.range();
    }