public void addDataSource(ChartDataSource source) {
sources.add(source);
LinkedHashMap<String, ChartDataSeries> newseries = source.getSeries();
for (Entry<String, ChartDataSeries> entry : newseries.entrySet()) {
// should do something... raise an exception?
addNewSerie(entry.getKey(), entry.getValue(), -1);
}
// series.putAll(source.getSeries());
}
