/**
  * @return array
  */
 public function index()
 {
     $paginator = Expansion::paginate(config('pagination.perPage', 10));
     $data = $paginator->getCollection();
     return fractal()->collection($data, new ExpansionTransformer(), 'expansion')->paginateWith(new IlluminatePaginatorAdapter($paginator))->toArray();
 }