removeModel((Model) getChild(n));
removeModel(getChild(n));
    public void removeChild(String n) throws Exception {        if (n != null) {            if (n.isEqualTo(Tree.MODEL)) {                removeModel((Model) getChild(n));            }        } else {            throw new Exception("Could not remove item. The name is null.");        }        super.removeChild(n);    }