code: func GetFlagStringSlice(cmd *cobra.Command, flag string) []string {
  	s, err := cmd.Flags().GetStringSlice(flag)
  	if err != nil {
  		klog.Fatalf("error accessing flag %s for command %s: %v", flag, cmd.Name(), err)
  	}
  	return s
  }
docs: // GetFlagStringSlice can be used to accept multiple argument with flag repetition (e.g. -f arg1,arg2 -f arg3 ...)