code: public XYSeries addSeries(String seriesName, int[] xData, int[] yData) {
  
      return addSeries(seriesName, xData, yData, null);
    }
docs: Add a series for a X-Y type chart using using int arrays
  
  @param seriesName
  @param xData the X-Axis data
  @param yData the Y-Axis data
  @return A Series object that you can set properties on