code: func newCmdCertsRenewal() *cobra.Command {
  	cmd := &cobra.Command{
  		Use:   "renew",
  		Short: "Renew certificates for a Kubernetes cluster",
  		Long:  cmdutil.MacroCommandLongDescription,
  		RunE:  cmdutil.SubCmdRunE("renew"),
  	}
  
  	cmd.AddCommand(getRenewSubCommands()...)
  
  	return cmd
  }
docs: // newCmdCertsRenewal creates a new `cert renew` command.