func (v *TreeIter) native() *C.GtkTreeIter {
	if v == nil {
		return nil
	}
	return &v.GtkTreeIter
}
func (v *TreeIter) native() *C.GtkTreeIter {
	if v == nil {
		return nil
	}
	return &v.GtkTreeIter
}
// native returns a pointer to the underlying GtkTreeIter.