306   for (auto* l : level_iters_) {  in Cleanup()
309   level_iters_.clear();  in Cleanup()
437       if (level_iters_[level - 1] == nullptr) {  in SeekInternal()
448         level_iters_[level - 1]->SetFileIndex(f_idx);  in SeekInternal()
449         seek_to_first ? level_iters_[level - 1]->SeekToFirst() :  in SeekInternal()
450                         level_iters_[level - 1]->Seek(internal_key);  in SeekInternal()
452         if (!level_iters_[level - 1]->status().ok()) {  in SeekInternal()
453           immutable_status_ = level_iters_[level - 1]->status();  in SeekInternal()
454         } else if (level_iters_[level - 1]->Valid() &&  in SeekInternal()
455                    !IsOverUpperBound(level_iters_[level - 1]->key())) {  in SeekInternal()
456           immutable_min_heap_.push(level_iters_[level - 1]);  in SeekInternal()
460           DeleteIterator(level_iters_[level - 1]);  in SeekInternal()
461           level_iters_[level - 1] = nullptr;  in SeekInternal()
599   for (ForwardLevelIterator* child_iter : level_iters_) {  in UpdateChildrenPinnedItersMgr()
744   for (auto* l : level_iters_) {  in RenewIterators()
747   level_iters_.clear();  in RenewIterators()
763   level_iters_.reserve(vstorage->num_levels() - 1);  in BuildLevelIterators()
771       level_iters_.push_back(nullptr);  in BuildLevelIterators()
776       level_iters_.push_back(new ForwardLevelIterator(  in BuildLevelIterators()
803   for (auto* level_iter : level_iters_) {  in ResetIncompleteIterators()
896     if (level_iters_[level - 1] == nullptr) {  in DeleteCurrentIter()
899     if (level_iters_[level - 1] == current_) {  in DeleteCurrentIter()
901       DeleteIterator(level_iters_[level - 1]);  in DeleteCurrentIter()
902       level_iters_[level - 1] = nullptr;  in DeleteCurrentIter()
925     if ((level_iters_[level - 1] == nullptr) &&  in TEST_CheckDeletedIters()