ListNodePtrAt

        ListPushBackR(&list, 40);
    
        GenericListNode *node1   = GENERIC_LIST_NODE(ListNodePtrAt(&list, 1));
        GenericListNode *begin   = GENERIC_LIST_NODE(ListNodeBegin(&list));
        GenericListNode *end     = GENERIC_LIST_NODE(ListNodeEnd(&list));

    
    static bool test_list_node_ptr_at_empty_fails(void) {
        WriteFmt("Testing ListNodePtrAt on empty list\n");
    
        List(int) list = ListInit(get_test_alloc());

    
        List(int) list = ListInit(get_test_alloc());
        ListNodePtrAt(&list, 0);
    
        return false;

    
    static bool test_list_node_ptr_at_out_of_bounds_fails(void) {
        WriteFmt("Testing ListNodePtrAt out of bounds\n");
    
        List(int) list = ListInit(get_test_alloc());

        List(int) list = ListInit(get_test_alloc());
        ListPushBackR(&list, 10);
        ListNodePtrAt(&list, 1);
    
        return false;

    /// TAGS: List, Iterator, Begin, Node
    ///
    #define ListNodeBegin(l) ListNodePtrAt((l), 0)
    
    ///

    /// TAGS: List, Node, Iterator, End
    ///
    #define ListNodeEnd(l) ListNodePtrAt((l), (l)->length - 1)
    
    ///