public function saveVariations()
 {
     $item = ActiveRecordModel::getInstanceByID('OrderedItem', $this->request->get('id'), OrderedItem::LOAD_DATA, OrderedItem::LOAD_REFERENCES);
     $variations = $item->getProduct()->getVariationData($this->application);
     $c = new OrderController($this->application);
     if (!$c->buildVariationsValidator($item, $variations)->isValid()) {
         return new RawResponse();
     }
     $product = $c->getVariationFromRequest($variations);
     $item->product->set($product);
     $item->save();
     $item->shipment->get()->save();
     return $this->getItemResponse($item);
 }