Sombra em Grafico de Barras do jfreechart

JFreeChart chart = ChartFactory.createPieChart(
            "",  // chart title
            dataset,             // data
            true,               // include legend
            true,
            false
        );

        PiePlot plot = (PiePlot) chart.getPlot();

        // retirando sombra do gráfico
        plot.setShadowPaint(Color.WHITE);