}
protected String getColumnId(DataSet dataSet, int index) {
List<DisplayerSettingsColumn> columnSettingsList = displayerSettings.getColumnList();
if (index < columnSettingsList.size()) {
DisplayerSettingsColumn settingsColumn = columnSettingsList.get(index);
if (settingsColumn.getColumnId() != null) return settingsColumn.getColumnId();
}
int ncolumns = dataSet.getColumns().size();
if (index < ncolumns) {
return dataSet.getColumnByIndex(index).getId();
}