}

    /**
     * Converts this item to a string representation for writing to file.
     * @return the string representation of this item
     */
    public String toLineString() {
        if (isUpdated()) {
            return StringUtils.join(newInput);
        }
        return StringUtils.join(input);
    }

    }

    /**
     * Converts the item to a string representation for writing to a file.
     *
     * @return A string in the format "input=>output".
     */
    public String toLineString() {
        if (isUpdated()) {
            return newInput + "=>" + newOutput;
        }
        return input + "=>" + output;
    }

    }

    /**
     * Converts the item to a string representation for writing to a file.
     *
     * @return The stopword as a string.
     */
    public String toLineString() {
        if (isUpdated()) {
            return StringUtils.join(newInput);
        }
        return StringUtils.join(input);
    }

     * If the item has pending updates, the new values are used; otherwise, the current values are used.
     *
     * @return compact string representation of the mapping rule
     */
    public String toLineString() {
        if (isUpdated()) {
            return StringUtils.join(newInputs, ",") + "=>" + newOutput;
        }
        return StringUtils.join(inputs, ",") + "=>" + output;
    }

    }

    /**
     * Returns the item as a line string.
     *
     * @return The item as a line string.
     */
    public String toLineString() {
        final StringBuilder buf = new StringBuilder(100);
        if (isUpdated()) {
            buf.append(quoteEscape(newToken));
            buf.append(',');

    }

    /**
     * Converts the item to a string representation for writing to a file.
     *
     * @return A string in the format "input1,input2=>output1,output2".
     */
    public String toLineString() {
        if (isUpdated()) {
            if (Arrays.equals(newInputs, newOutputs)) {
                return StringUtils.join(newInputs, ",");
            }