@Override
    protected boolean cancelProgress() {
        synchronized (this) {
            if (loadingJob != null) {
                loadingJob.cancel();
                return true;
            }
        }
        return false;
    }
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