code: func (s *store) GetLastUpdatedOldBlocksPvtData() (map[uint64][]*ledger.TxPvtData, error) {
  	if !s.isLastUpdatedOldBlocksSet {
  		return nil, nil
  	}
  
  	updatedBlksList, err := s.getLastUpdatedOldBlocksList()
  	if err != nil {
  		return nil, err
  	}
  
  	blksPvtData := make(map[uint64][]*ledger.TxPvtData)
  	for _, blkNum := range updatedBlksList {
  		if blksPvtData[blkNum], err = s.GetPvtDataByBlockNum(blkNum, nil); err != nil {
  			return nil, err
  		}
  	}
  	return blksPvtData, nil
  }
docs: // GetLastUpdatedOldBlocksPvtData implements the function in the interface `Store`