* Represents a numeric item in the version item list that can be represented with a long.
     */
    private static class LongItem implements Item {
        private final long value;

        LongItem(String str) {
            this.value = Long.parseLong(str);
        }

        @Override
        public int getType() {
            return LONG_ITEM;
        }

        @Override
        public boolean isNull() {