code: func ParseBool(value string) (bool, error) {
  	switch strings.ToLower(value) {
  	case "yes", "yeah", "y", "true", "1", "on":
  		return true, nil
  	case "no", "nope", "n", "false", "0", "off":
  		return false, nil
  	default:
  		return false, trace.BadParameter("unsupported value: %q", value)
  	}
  }
docs: // ParseBool parses string as boolean value,
  // returns error in case if value is not recognized