public Tuple<IEnumerable<FolderNode>, IEnumerable<Campaign>> Folder()
{
CampaignRepository campaignRepos = new CampaignRepository(unitOfWork);
FolderNodeRepository folderRepos = new FolderNodeRepository(unitOfWork);
return new Tuple<IEnumerable<FolderNode>, IEnumerable<Campaign>>(folderRepos.FindByRoot(FolderNodeType.Campaign), new List<Campaign>());
}
