/**
  * {@inheritdoc}
  */
 protected function getResults()
 {
     return new \ArrayIterator($this->repository->getAllVariantGroups());
 }
 /**
  * Get valid variant groups to display
  *
  * @return array
  */
 public function getVariantGroups()
 {
     return $this->groupRepository->getAllVariantGroups();
 }