case DEF_OPEN_SUB_GRAPH:
{
// call request owner method (PROCESS REQUEST)
IUIRequestOwner bufOwner = request.getOwner();
if(bufOwner != null) {
bufOwner.callRequestOwner(new AUIRequest(EUIRequestType.PROCESS, null) {});
}
// execute query
UIRequestOpenSubGraph req = (UIRequestOpenSubGraph)request;
final IGraphView igv = req.getSubGraphView();
SwingUtilities.invokeLater(new Runnable() {