private function save(ProductFileGroup $fileGroup)
 {
     $validator = $this->buildValidator();
     if ($validator->isValid()) {
         foreach ($this->application->getLanguageArray(true) as $lang) {
             if ($this->request->isValueSet('name_' . $lang)) {
                 $fileGroup->setValueByLang('name', $lang, $this->request->get('name_' . $lang));
             }
         }
         $fileGroup->save();
         return new JSONResponse(array('status' => "success", 'ID' => $fileGroup->getID()));
     } else {
         return new JSONResponse(array('status' => "failure", 'errors' => $validator->getErrorList()));
     }
 }