code: func (o *ServiceExternalNameOpts) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
  	name, err := NameFromCommandArgs(cmd, args)
  	if err != nil {
  		return err
  	}
  
  	var generator generate.StructuredGenerator
  	switch generatorName := cmdutil.GetFlagString(cmd, "generator"); generatorName {
  	case generateversioned.ServiceExternalNameGeneratorV1Name:
  		generator = &generateversioned.ServiceCommonGeneratorV1{
  			Name:         name,
  			Type:         v1.ServiceTypeExternalName,
  			ExternalName: cmdutil.GetFlagString(cmd, "external-name"),
  			ClusterIP:    "",
  		}
  	default:
  		return errUnsupportedGenerator(cmd, generatorName)
  	}
  
  	return o.CreateSubcommandOptions.Complete(f, cmd, args, generator)
  }
docs: // Complete completes all the required options