protected JFreeChart createStackedBar3DChart() throws JRException {
   JFreeChart jfreeChart = super.createStackedBar3DChart();
   CategoryPlot categoryPlot = (CategoryPlot) jfreeChart.getPlot();
   BarRenderer3D barRenderer3D = (BarRenderer3D) categoryPlot.getRenderer();
   barRenderer3D.setWallPaint(ChartThemesConstants.TRANSPARENT_PAINT);
   barRenderer3D.setItemMargin(0);
   CategoryDataset categoryDataset = categoryPlot.getDataset();
   if (categoryDataset != null) {
     for (int i = 0; i < categoryDataset.getRowCount(); i++) {
       barRenderer3D.setSeriesOutlinePaint(i, ChartThemesConstants.TRANSPARENT_PAINT);
     }
   }
   return jfreeChart;
 }