code: func MSet(keys, values []string) error {
  	err := _MSet(_SETTINGS.user, keys, values)
  	if err != nil {
  		return err
  	}
  
  	if _SETTINGS.useKDE {
  		return _MSet(_SETTINGS.kde, keys, values)
  	}
  	return nil
  }
docs: // MSet sets multiple values of the environment variables named by the keys
  // that affects the current user.
  // It returns an error, if any.