anchors_delfunc
anchors_delfunc(&ta->node, NULL);
anchors_delfunc(&ta->node, NULL);
traverse_postorder(anchors->tree, anchors_delfunc, NULL);
anchors_delfunc(&ta->node, NULL);
anchors_delfunc(&ta->node, NULL);
traverse_postorder(anchors->tree, anchors_delfunc, NULL);