BlockIndexAt
uint64 nextBlockIndex = info.entryBlock.BlockIndexAt(info.index);
uint64 childBlockIndex = entryBlock.BlockIndexAt(i);
inline uint64 BlockIndexAt(int32 index) const;
uint64 blockIndex = entryBlock.BlockIndexAt(index);
uint64 nextBlockIndex = info.entryBlock.BlockIndexAt(info.index);
uint64 nextBlockIndex = previousInfo.entryBlock.BlockIndexAt(
_blockIndex = info.entryBlock.BlockIndexAt(info.index);
uint64 nextBlockIndex = info.entryBlock.BlockIndexAt(info.index);
uint64 nextBlockIndex = info.entryBlock.BlockIndexAt(info.index);