BlockLen
size_t availableSpace = fInode->GetVolume()->BlockSize() - BlockLen();
return BlockLen() + maxRecords * KeySize() + (pos - 1) * PtrSize();
((char*)buffer + BlockLen() + (pos - 1) * KeySize());
char* base = fPathForData[pathIndex].blockData + BlockLen();
char* base = fPathForLeaves[pathIndex].blockData + BlockLen();
uint32 BlockLen();