* If the item is being updated, it writes the new version.
         *
         * @param oldItem The original item from the dictionary.
         * @return The written item, or null if the item was deleted.
         * @throws DictionaryException if the file was updated concurrently.
         */
        public StemmerOverrideItem write(final StemmerOverrideItem oldItem) {
            try {

        }

        /**
         * Writes a character mapping item to the temporary file.
         *
         * @param oldItem the existing mapping item to process
         * @return the mapping item that was written, or null if the item was deleted
         */
        public CharMappingItem write(final CharMappingItem oldItem) {
            try {
                if (item == null || item.getId() != oldItem.getId() || !item.isUpdated()) {