code: func PrettyPrintAsJSON(input interface{}, indent ...string) error {
  	var indentStr string
  	if len(indent) == 0 {
  		indentStr = "  "
  	} else {
  		indentStr = strings.Join(indent, "")
  	}
  	data, err := json.MarshalIndent(input, "", indentStr)
  	if err != nil {
  		return err
  	}
  	_, err = fmt.Println(string(data))
  	return err
  }
docs: // PrettyPrintAsJSON marshalles input as indented JSON
  // and calles fmt.Println with the result.
  // If indent arguments are given, they are joined into
  // a string and used as JSON line indent.
  // If no indet argument is given, two spaces will be used
  // to indent JSON lines.