public void test_isUpdated() {
        // Test isUpdated method
        StopwordsItem item = new StopwordsItem(1, "original");
        assertFalse(item.isUpdated());

        item.setNewInput("updated");
        assertTrue(item.isUpdated());

        item.setNewInput("");
        assertTrue(item.isUpdated());

        item.setNewInput(null);
        assertFalse(item.isUpdated());
    }

    public void test_isDeleted() {

    public void test_isUpdated() {
        // Test isUpdated method
        ProtwordsItem item = new ProtwordsItem(1, "word");
        assertFalse(item.isUpdated());

        item.setNewInput("newword");
        assertTrue(item.isUpdated());

        item.setNewInput("");
        assertTrue(item.isUpdated());

        item.setNewInput(null);
        assertFalse(item.isUpdated());
    }

    public void test_isDeleted() {

        // Initially not updated
        assertFalse(item.isUpdated());

        // Set only newInputs - still not updated
        item.setNewInputs(new String[] { "new" });
        assertFalse(item.isUpdated());

        // Set both newInputs and newOutput - now updated
        item.setNewOutput("newOutput");
        assertTrue(item.isUpdated());

        // Set newInputs to null - not updated

         */
        public KuromojiItem write(final KuromojiItem oldItem) {
            try {
                if (item == null || item.getId() != oldItem.getId() || !item.isUpdated()) {
                    writer.write(oldItem.toLineString());
                    writer.write(Constants.LINE_SEPARATOR);
                    return oldItem;
                }

         */
        public CharMappingItem write(final CharMappingItem oldItem) {
            try {
                if (item == null || item.getId() != oldItem.getId() || !item.isUpdated()) {
                    writer.write(oldItem.toLineString());
                    writer.write(Constants.LINE_SEPARATOR);
                    return oldItem;
                }

         */
        public SynonymItem write(final SynonymItem oldItem) {
            try {
                if (item == null || item.getId() != oldItem.getId() || !item.isUpdated()) {
                    writer.write(oldItem.toLineString());
                    writer.write(Constants.LINE_SEPARATOR);
                    return oldItem;
                }

         */
        public ProtwordsItem write(final ProtwordsItem oldItem) {
            try {
                if (item == null || item.getId() != oldItem.getId() || !item.isUpdated()) {
                    writer.write(oldItem.toLineString());
                    writer.write(Constants.LINE_SEPARATOR);
                    return oldItem;
                }

         */
        public StopwordsItem write(final StopwordsItem oldItem) {
            try {
                if (item == null || item.getId() != oldItem.getId() || !item.isUpdated()) {
                    writer.write(oldItem.toLineString());
                    writer.write(Constants.LINE_SEPARATOR);
                    return oldItem;
                }

         */
        public StemmerOverrideItem write(final StemmerOverrideItem oldItem) {
            try {
                if (item == null || item.getId() != oldItem.getId() || !item.isUpdated()) {
                    writer.write(oldItem.toLineString());
                    writer.write(Constants.LINE_SEPARATOR);
                    return oldItem;
                }

    }

    /**
     * Checks if the properties file has been updated since the last load.
     *
     * @return {@code true} if the file has been updated, {@code false} otherwise.
     */
    public boolean isUpdated() {
        final long now = System.currentTimeMillis();
        if (now - lastChecked < checkInterval) {
            lastChecked = now;
            return false;
        }
        lastChecked = now;