private void fillDataSource() throws Exception {
   listDataSource = new ListDataSource();
   listDataSource.addRow(new Row(createRowMap("Scénario 1", "0.50", "John", "hidden 1")));
   listDataSource.addRow(new Row(createRowMap("Scénario 1", "0.50", "Robert", "hidden 1")));
   listDataSource.addRow(new Row(createRowMap("Scénario 2", "0.75", "John", "hidden 2")));
   listDataSource.addRow(new Row(createRowMap("Scénario 2", "0.75", "Robert", "hidden 2")));
   listDataSource.addRow(new Row(createRowMap("Scénario 3", "1.50", "John", "hidden 3")));
 }