public void removeModel(Model m) throws Exception {
public void removeModel(Item m) throws Exception {
    public void removeModel(Model m) throws Exception {        javax.swing.JTree t = (javax.swing.JTree) getJavaObject();        if (t != null) {            t.setModel(null);        } else {            throw new Exception("Could not remove model. The java tree node is null.");        }    }