public function index()
{
$apiRequest = RequestFactory::create();
$page = $apiRequest->getPage();
if (!$page->size()) {
$page->setSize($this->pageSize);
}
$fields = $apiRequest->getFields();
$sorting = $apiRequest->getSort();
$included = $apiRequest->getIncludedRelationships();
$filters = $apiRequest->getFilters();
$resource = new ListResource($this->serializer, $page, $fields, $sorting, $included, $filters);
$totalAmount = $this->totalAmountResourceCallable();
$results = $this->listResourceCallable();
$controllerAction = '\\' . get_called_class() . '@index';
$uri = $this->uriGenerator($controllerAction);
return $this->addHeaders($resource->get($totalAmount, $results, $uri, get_class($this->getDataModel())));
}