public String getLabelFormat() {
        return this.labelFormat;
    }

    /**
     * Returns the number formatter.
     *
     * @return The formatter (never <code>null</code>).
     */
    public NumberFormat getNumberFormat() {
        return this.numberFormat;
    }

    /**
     * Returns the percent formatter.
     *
     * @return The formatter (never <code>null</code>).
     */
    public NumberFormat getPercentFormat() {
        return this.percentFormat;