code: public PieSeries updatePieSeries(String seriesName, Number value) {
  
      Map<String, PieSeries> seriesMap = getSeriesMap();
      PieSeries series = seriesMap.get(seriesName);
      if (series == null) {
        throw new IllegalArgumentException("Series name >" + seriesName + "< not found!!!");
      }
      series.replaceData(value);
  
      return series;
    }
docs: Update a series by updating the pie slide value
  
  @param seriesName
  @param value
  @return