typedef struct Tree<Impl{
    union Data* tree;
    struct Node* node;
    __code putRedBlackTree(Impl* traverse, struct Node* node, struct Node* root, struct Node* newNode);
    __code getRedBlackTree(Impl* traverse, __code next(...));
    // __code removeRedBlackTree();
    // __code clearRedBlackTree();
    __code next(...);
} Tree;