for (SeriesType series : this.obsPlotPane.getObsModel().getSeriesKeys()) {
if (!series.isSynthetic() && !series.isUserDefined()) {
String seriesName = series.getDescription();
JRadioButton seriesRadioButton = new JRadioButton(seriesName);
seriesRadioButton.setActionCommand(seriesName);
seriesRadioButton.addActionListener(this);
seriesRadioButton.setEnabled(isSeriesNonEmpty(series));
panel.add(seriesRadioButton);
panel.add(Box.createRigidArea(new Dimension(3, 3)));
seriesGroup.add(seriesRadioButton);
checkInitialMeanSourceSeries(series, seriesRadioButton);