public function unassignAggregator(CommercialGroupModel $cg)
 {
     if (!$cg) {
         throw new AppEx\InvalidArgumentException('Params cannot be null');
     }
     $cg->setAggregatorId("");
     $cg->setAggregatorName(null);
     $result = $this->update($cg);
     return $result;
 }