*/
protected JPopupMenu createPopupMenu() {
ActionManager actionManager = Application.getInstance().getActionManager();
JPopupMenu menu = new JPopupMenu();
menu.add(new EntityDisplayAction(this).buildMenu());
menu.addSeparator();
menu.add(new EntityDisplayAction(this, actionManager
.getAction(CreateAttributeAction.class)).buildMenu());
menu.add(new EntityDisplayAction(this, actionManager
.getAction(CreateRelationshipAction.class)).buildMenu());
menu.addSeparator();
menu.add(new RemoveEntityAction(this));
return menu;