code: func (s *Status) String() string {
  	return fmt.Sprintf("LastCheckedTime=%v Progress=%v CurrentOperation=%q NewVersion=%v NewSize=%v",
  		s.LastCheckedTime,
  		s.Progress,
  		s.CurrentOperation,
  		s.NewVersion,
  		s.NewSize,
  	)
  }
docs: // String returns a string representation of the Status struct.
  // It is of the form
  // "LastCheckedTime=%v Progress=%v CurrentOperation=%q NewVersion=%v NewSize=%v"