code: func (volume *VolumeToAttach) GenerateError(prefixMsg string, err error) (simpleErr, detailedErr error) {
  	simpleMsg, detailedMsg := volume.GenerateMsg(prefixMsg, errSuffix(err))
  	return fmt.Errorf(simpleMsg), fmt.Errorf(detailedMsg)
  }
docs: // GenerateError returns simple and detailed errors for volumes to attach