class WFSQueryController implements QueryRegionListener, EventListener<ActiveDataGroupsChangedEvent>, ListDataListener<TimeSpan> {

    @Override
    public void elementsRemoved(ListDataEvent<TimeSpan> e)
    {
        myGovernorManager.clearData(new Pair<>(null, null), e.getChangedElements());
    }

    public  WFSQueryController(Toolbox toolbox);

}