code: func (s *store) ResetLastUpdatedOldBlocksList() error {
  	batch := leveldbhelper.NewUpdateBatch()
  	batch.Delete(lastUpdatedOldBlocksKey)
  	if err := s.db.WriteBatch(batch, true); err != nil {
  		return err
  	}
  	s.isLastUpdatedOldBlocksSet = false
  	return nil
  }
docs: // ResetLastUpdatedOldBlocksList implements the function in the interface `Store`