setTypeIterator *setTypeInitIterator(robj *subject) {
    setTypeIterator *si = zmalloc(sizeof(setTypeIterator));
    si->subject = subject;
    si->encoding = subject->encoding;
    if (si->encoding == OBJ_ENCODING_HT) {
        si->di = dictGetIterator(subject->ptr);
    } else if (si->encoding == OBJ_ENCODING_INTSET) {
        si->ii = 0;
    } else {
        serverPanic("Unknown set encoding");
    }
    return si;
}
setTypeIterator *setTypeInitIterator(robj *subject) {
    setTypeIterator *si = zmalloc(sizeof(setTypeIterator));
    si->subject = subject;
    si->encoding = subject->encoding;
    if (si->encoding == OBJ_ENCODING_HT) {
        si->di = dictGetIterator(subject->ptr);
    } else if (si->encoding == OBJ_ENCODING_INTSET) {
        si->ii = 0;
    } else {
        serverPanic("Unknown set encoding");
    }
    return si;
}