public int getPassCount() {
        return 1;
    }

    /**
     * Returns the plot that the renderer has been assigned to (where
     * <code>null</code> indicates that the renderer is not currently assigned
     * to a plot).
     *
     * @return The plot (possibly <code>null</code>).
     *
     * @see #setPlot(CategoryPlot)
     */
    public CategoryPlot getPlot() {
        return this.plot;