code: func (v *TreeModel) GetIter(path *TreePath) (*TreeIter, error) {
  	var iter C.GtkTreeIter
  	c := C.gtk_tree_model_get_iter(v.native(), &iter, path.native())
  	if !gobool(c) {
  		return nil, errors.New("Unable to set iterator")
  	}
  	t := &TreeIter{iter}
  	return t, nil
  }
docs: // GetIter() is a wrapper around gtk_tree_model_get_iter().