GetHeader
return le2h(GetHeader()->blk_level);
return le2h(GetHeader()->blk_nr_item);
return le2h(GetHeader()->blk_free_space);
block_head *GetHeader() const;
SetTo(item.GetNode(), item.GetHeader());
SetTo(item.GetNode(), item.GetHeader());
ItemHeader *GetHeader() const;
closeItem.GetHeader()->GetKey(&itemKey);
status_t status = fProtocol->GetHeader(fMessageID, fSlave);
status_t GetHeader(int32 message, BPositionIO* to);