*/
    public boolean isUpdated() {
        return newInput != null;
    }

    /**
     * Checks if this item has been deleted.
     * @return true if deleted, false otherwise
     */
    public boolean isDeleted() {
        return isUpdated() && newInput.length() == 0;
    }

    @Override
    public int hashCode() {
        return java.util.Objects.hashCode(input);
    }

    @Override

    }

    /**
     * Checks if the item has been marked for deletion.
     *
     * @return true if the item is marked for deletion, false otherwise.
     */
    public boolean isDeleted() {
        return isUpdated() && StringUtil.isBlank(newInput);
    }

    @Override
    public int hashCode() {
        return Objects.hash(input, output);
    }

    @Override

    }

    /**
     * Checks if the item has been marked for deletion.
     *
     * @return true if the item is marked for deletion, false otherwise.
     */
    public boolean isDeleted() {
        return isUpdated() && newInput.length() == 0;
    }

    @Override
    public int hashCode() {
        return java.util.Objects.hashCode(input);
    }

    @Override

    }

    /**
     * Checks if the item has been marked for deletion.
     *
     * @return true if the item is marked for deletion, false otherwise.
     */
    public boolean isDeleted() {
        return isUpdated() && newInputs.length == 0;
    }

    @Override
    public int hashCode() {
        return Objects.hash(Arrays.hashCode(inputs), Arrays.hashCode(outputs));
    }

        return newToken != null;
    }

    /**
     * Returns true if the item has been deleted.
     *
     * @return True if the item has been deleted.
     */
    public boolean isDeleted() {
        return isUpdated() && newToken.length() == 0;
    }

    @Override
    public int hashCode() {
        return Objects.hash(pos, reading, segmentation, token);
    }

    @Override

     * An item is considered deleted if it has updates pending and the new inputs array is empty.
     *
     * @return true if the item is marked for deletion
     */
    public boolean isDeleted() {
        return isUpdated() && newInputs.length == 0;
    }

    /**
     * Sorts both the current inputs and new inputs arrays in place.

        assertFalse(stemmerOverrideItem.isUpdated());
        assertFalse(stemmerOverrideItem.isDeleted());

        stemmerOverrideItem.setNewInput("bbb");
        stemmerOverrideItem.setNewOutput("b");
        assertTrue(stemmerOverrideItem.isUpdated());
        assertFalse(stemmerOverrideItem.isDeleted());

        stemmerOverrideItem.setNewInput("");
        stemmerOverrideItem.setNewOutput("");

        assertFalse(kuromojiItem.isUpdated());
        assertFalse(kuromojiItem.isDeleted());

        kuromojiItem.setNewToken("T1");
        kuromojiItem.setNewSegmentation("S1");
        kuromojiItem.setNewReading("R1");
        kuromojiItem.setNewPos("P1");
        assertTrue(kuromojiItem.isUpdated());
        assertFalse(kuromojiItem.isDeleted());

        kuromojiItem.setNewToken("");

        assertFalse(synonymItem.isUpdated());
        assertFalse(synonymItem.isDeleted());

        synonymItem.setNewInputs(new String[] { "1", "2" });
        synonymItem.setNewOutputs(new String[] { "3", "4" });
        assertTrue(synonymItem.isUpdated());
        assertFalse(synonymItem.isDeleted());

        synonymItem.setNewInputs(new String[0]);
        synonymItem.setNewOutputs(new String[0]);

                    // skip
                    continue;
                }
                try {
                    boolean isDelete = false;
                    if (targetWord.startsWith(DELETE_PREFIX)) {
                        isDelete = true;
                        targetWord = targetWord.substring(2);
                    }
                    final String target = targetWord;