gtk/gtk.go
func (v *TreeModel) GetIterFirst() (*TreeIter, bool) {
	var iter C.GtkTreeIter
	c := C.gtk_tree_model_get_iter_first(v.native(), &iter)
	if !gobool(c) {
		return nil, false
	}
	t := &TreeIter{iter}
	return t, true
}
func (v *TreeModel) GetIterFirst() (*TreeIter, bool) {
	var iter C.GtkTreeIter
	c := C.gtk_tree_model_get_iter_first(v.native(), &iter)
	if !gobool(c) {
		return nil, false
	}
	t := &TreeIter{iter}
	return t, true
}
// GetIterFirst() is a wrapper around gtk_tree_model_get_iter_first().