/**
  * @return array
  */
 protected function prepareParameters()
 {
     $queryParameters = parent::prepareParameters();
     $variantGroupId = $queryParameters['currentGroup'];
     if (null !== $variantGroupId) {
         $productIds = $this->productRepository->getEligibleProductIdsForVariantGroup($variantGroupId);
         if (count($productIds) === 0) {
             $productIds = [0];
         }
     } else {
         $productIds = [0];
     }
     $queryParameters['productIds'] = $productIds;
     return $queryParameters;
 }