struct Data { /* data segments as types */
    struct Tree { /* ... */ } tree;
    struct Node { /* ... */ } node;

    struct IterElem { /* ... */ } iterElem;
    struct Iterator { /* ... */ } iterator;
    struct AkashaInfo { /* ... */} akashaInfo;
    struct AkashaNode { /* ... */} akashaNode;
};


struct Context { /* meta data segment as subtype */
    /* ... fields for meta computations ... */
    struct Data **data; /* data segments */
};