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)));
}