code: func (containers Containers) maxNameLength() (maxPrefixLength int) {
  	for _, container := range containers {
  		prefixLength := len(container.ActualName(false))
  		if prefixLength > maxPrefixLength {
  			maxPrefixLength = prefixLength
  		}
  	}
  	return
  }
docs: // Return the length of the longest container name.