add: D("gtk_tree_model_iter_previous");
context: gtk_tree_model_iter_previous (GtkTreeModel *tree_model, GtkTreeIter *iter){	GtkTreePath *path;	gboolean ret;	path = gtk_tree_model_get_path (tree_model, iter);	ret = gtk_tree_path_prev (path);	if (ret == TRUE)		gtk_tree_model_get_iter (tree_model, iter, path);	gtk_tree_path_free (path);	return ret;}