code: func MSetForUid(id int, keys, values []string) error {
  	_settings, err := getSettingsForUid(id)
  	if err != nil {
  		return err
  	}
  
  	if err = _MSet(_settings.user, keys, values); err != nil {
  		return err
  	}
  	if _settings.useKDE {
  		return _MSet(_settings.kde, keys, values)
  	}
  	return nil
  }
docs: // MSetForUid sets multiple values of the environment variables named by the
  // keys that affects a particular user.
  // It returns an error, if any.