code: func EncodeRowKey(tableID int64, encodedHandle []byte) kv.Key {
  	buf := make([]byte, 0, recordRowKeyLen)
  	buf = appendTableRecordPrefix(buf, tableID)
  	buf = append(buf, encodedHandle...)
  	return buf
  }
docs: // EncodeRowKey encodes the table id and record handle into a kv.Key