ITREE_PRE_ORDER  1282 src/itree.c        case ITREE_PRE_ORDER:
ITREE_PRE_ORDER  1362 src/itree.c            case ITREE_PRE_ORDER:
ITREE_PRE_ORDER   866 test/manual/noverlay/itree-tests.c     itree_iterator_start (&tree, 0, 100, ITREE_PRE_ORDER, NULL, 0);