gtk/gtk.go
func (v *TreeStore) Append(parent *TreeIter) *TreeIter {
	var ti C.GtkTreeIter
	var cParent *C.GtkTreeIter
	if parent != nil {
		cParent = parent.native()
	}
	C.gtk_tree_store_append(v.native(), &ti, cParent)
	iter := &TreeIter{ti}
	return iter
}
func (v *TreeStore) Append(parent *TreeIter) *TreeIter {
	var ti C.GtkTreeIter
	var cParent *C.GtkTreeIter
	if parent != nil {
		cParent = parent.native()
	}
	C.gtk_tree_store_append(v.native(), &ti, cParent)
	iter := &TreeIter{ti}
	return iter
}
// Append is a wrapper around gtk_tree_store_append().