52       assert(second_level_iter_.iter() == nullptr);  in status()
54     } else if (second_level_iter_.iter() != nullptr &&  in status()
72   void SetSecondLevelIterator(InternalIteratorBase<IndexValue>* iter);
93   if (second_level_iter_.iter() != nullptr) {  in Seek()
102   if (second_level_iter_.iter() != nullptr) {  in SeekForPrev()
109       if (second_level_iter_.iter() != nullptr) {  in SeekForPrev()
120   if (second_level_iter_.iter() != nullptr) {  in SeekToFirst()
129   if (second_level_iter_.iter() != nullptr) {  in SeekToLast()
148   while (second_level_iter_.iter() == nullptr ||  in SkipEmptyDataBlocksForward()
157     if (second_level_iter_.iter() != nullptr) {  in SkipEmptyDataBlocksForward()
164   while (second_level_iter_.iter() == nullptr ||  in SkipEmptyDataBlocksBackward()
173     if (second_level_iter_.iter() != nullptr) {  in SkipEmptyDataBlocksBackward()
180     InternalIteratorBase<IndexValue>* iter) {  in SetSecondLevelIterator()  argument
181   InternalIteratorBase<IndexValue>* old_iter = second_level_iter_.Set(iter);  in SetSecondLevelIterator()
190     if (second_level_iter_.iter() != nullptr &&  in InitDataBlock()
196       InternalIteratorBase<IndexValue>* iter =  in InitDataBlock()  local
199       SetSecondLevelIterator(iter);  in InitDataBlock()