code: func (zm zipMetaInfo) rowValue(offset uint64) string {
  	return fmt.Sprintf("%d %v %d %d %d", zm.zipSize, zm.wholeRef, zm.wholeSize, offset, zm.dataSize)
  }
docs: // rowValue returns the value of the "z:<zipref>" meta key row
  // based on the contents of zm and the provided arguments.