public async Task <JsonResult> GetComboList()
        {
            var user = HttpContext.Session.Get <User>(Constants.SessionKeyState);

            int    rolId           = user.Role.Id;
            string userId          = user.Id;
            string establishmentId = user.Establishment.id;
            var    list            = new Response <IEnumerable <Combo> >();

            list = _comboAgent.GetCombos(userId, establishmentId);
            return(await Task.FromResult(Json(list)));
        }