code: func (s *Store) CommitPvtDataOfOldBlocks(blocksPvtData map[uint64][]*ledger.TxPvtData) error {
  	err := s.pvtdataStore.CommitPvtDataOfOldBlocks(blocksPvtData)
  	if err != nil {
  		return err
  	}
  	return nil
  }
docs: // CommitPvtDataOfOldBlocks commits the pvtData of old blocks