@Nullable
    protected final Object getCellValue(Object element, int columnIndex) {
        final ObjectColumn columnInfo = getColumnByIndex(columnIndex);
        if (columnInfo == null) {
            return null;
        }
        return getCellValue(element, columnInfo, true);
    }
Used to save/load columns configuration.
Must depend on object types

@param classList classes of objects in the list
plugins/org.jkiss.dbeaver.ui.navigator/src/org/jkiss/dbeaver/ui/navigator/itemlist/ObjectListControl.java