code: func (level Level) String() string {
  	switch level {
  	case EMERGENCY:
  		return "EMERGENCY"
  	case ALERT:
  		return "ALERT"
  	case CRITICAL:
  		return "CRITICAL"
  	case ERROR:
  		return "ERROR"
  	case WARNING:
  		return "WARNING"
  	case NOTICE:
  		return "NOTICE"
  	case INFO:
  		return "INFO"
  	default:
  		return "DEBUG"
  	}
  }
docs: // String returns stirng representation of log level.