Invient charts: Individual Bar BorderColor

Hi,

is there a way to set the BorderColor of a any Bar individually?

This way does not work:

InvientChartsConfig.BarConfig colCfgProcess = new InvientChartsConfig.BarConfig();
		colCfgProcess.setColor(colProcessColor);
		colCfgProcess.setBorderColor(colProcessColor);
		colCfgProcess.setBorderWidth(colBoderWidth);
		colCfgProcess.setShadow(false);
		colCfgProcess.setStacking(Stacking.NORMAL);

XYSeries seriesDataProcessTime = new XYSeries("xxxxxxxxxx",
				colCfgProcess);
		seriesDataProcessTime.setSeriesPoints(getPoints(seriesDataProcessTime,
				parseProcess(cd)));
		seriesDataProcessTime.setStack("process");
		chart.addSeries(seriesDataProcessTime);

I always have a white Border until I change the config of the whole Chart.