} catch (IOException ex) {
//Exceptions.printStackTrace(ex);
}
ImportController importController = Lookup.getDefault().lookup(ImportController.class);
FileImporter fileImporter = importController.getFileImporter(".gexf");
Container container = importController.importFile(stream, fileImporter);
importController.process(container, new DefaultProcessor(), workspace);
PreviewModel model = Lookup.getDefault().lookup(PreviewController.class).getModel();
model.getNodeSupervisor().setShowNodeLabels(Boolean.TRUE);