void () { assertEquals(Arrays.asList(2, 5, 5, 6, 6, 7, 7, 2, 3, 8, 8, 9, 9, 10, 10, 3, 4, 11, 11, 12, 12, 13, 13, 4), TreeTraversal.BI_ORDER_DFS.traversal(numbers().get(1), Functions.fromMap(numbers())).toList()); }