code: func ValidateLogOpts(cfg map[string]string) error {
  	for k := range cfg {
  		switch k {
  		case projectOptKey, logLabelsKey, logLabelsRegexKey, logEnvKey, logEnvRegexKey, logCmdKey, logZoneKey, logNameKey, logIDKey:
  		default:
  			return fmt.Errorf("%q is not a valid option for the gcplogs driver", k)
  		}
  	}
  	return nil
  }
docs: // ValidateLogOpts validates the opts passed to the gcplogs driver. Currently, the gcplogs
  // driver doesn't take any arguments.