streamUserChanges method

Implementation

Stream<UserMessagingVO?> streamUserChanges(String userId) {
  return _userMessagingDataService
      .streamUserMessagingChanges(userId)
      .map((event) {
    if (event == null) {
      return null;
    }
    final vo = UserMessagingVO.fromModel(event);
    return vo;
  });
}