public void addExistentialPanel(OWLObjectProperty property) {
OWLModel model = (OWLModel) getKnowledgeBase();
OWLVizGraphPanel panel = new OWLVizGraphPanel(this,
new ExistentialGraphModel(model, property),
new AssertedClsHierarchyDisplayPanel(model));
tabbedPane.add(property.getBrowserText() + " hierarchy", panel);
closableTabs.add(panel);
componentGroupMap.put(panel, Collections.singleton(panel.getGraphComponent()));
graphComponents.add(panel.getGraphComponent());