code: func LvlFromString(lvlString string) (Lvl, error) {
  	switch lvlString {
  	case "trace", "trce":
  		return LvlTrace, nil
  	case "debug", "dbug":
  		return LvlDebug, nil
  	case "info":
  		return LvlInfo, nil
  	case "warn":
  		return LvlWarn, nil
  	case "error", "eror":
  		return LvlError, nil
  	case "crit":
  		return LvlCrit, nil
  	default:
  		return LvlDebug, fmt.Errorf("Unknown level: %v", lvlString)
  	}
  }
docs: // LvlFromString returns the appropriate Lvl from a string name.
  // Useful for parsing command line args and configuration files.