code: public BubbleSeries addSeries(
        String seriesName,
        List<? extends Number> xData,
        List<? extends Number> yData,
        List<? extends Number> bubbleData) {
  
      return addSeries(
          seriesName,
          Utils.getDoubleArrayFromNumberList(xData),
          Utils.getDoubleArrayFromNumberList(yData),
          Utils.getDoubleArrayFromNumberList(bubbleData));
    }
docs: Add a series for a Bubble type chart using using double arrays
  
  @param seriesName
  @param xData the X-Axis data
  @param xData the Y-Axis data
  @param bubbleData the bubble data
  @return A Series object that you can set properties on