public function getResult(Request $request)
{
$listingRequest = new ItemTypesListingRequest();
// TODO: strict validation of arguments
$listingRequest->setPerPage((int) $request->get('per_page', 100));
$listingRequest->setPage((int) $request->get('page', 1));
$itemTypes = $this->apiFactory->newListItemTypesUseCase()->listItemTypes($listingRequest);
$response = $this->app->json($this->getSerializedTypes($itemTypes));
(new PaginationHeaderSetter($response->headers))->setHeaders($request->getUriForPath('/items/types'), $listingRequest, count($itemTypes));
return $response;
}