* @return
*/
public JFreeChart build(){
XYSeriesCollection collection = new XYSeriesCollection();
for(XYSeries s : seriesMap.values()){
collection.addSeries(s);
}
JFreeChart chart = ChartFactory.createXYLineChart(chartName, xDomain, yDomain, collection, PlotOrientation.VERTICAL, true, true, false);
XYPlot plot = chart.getXYPlot();
plot.setBackgroundPaint(Color.WHITE);
plot.setDomainGridlinePaint(Color.LIGHT_GRAY);