code: func (s *Restore) KVS(entry *structs.DirEntry) error {
  	if err := s.tx.Insert("kvs", entry); err != nil {
  		return fmt.Errorf("failed inserting kvs entry: %s", err)
  	}
  
  	if err := indexUpdateMaxTxn(s.tx, entry.ModifyIndex, "kvs"); err != nil {
  		return fmt.Errorf("failed updating index: %s", err)
  	}
  	return nil
  }
docs: // KVS is used when restoring from a snapshot. Use KVSSet for general inserts.