/**
  * Returns a paginated list of invoices.
  *
  * @ApiDoc(
  *  resource=true,
  *  output={"class"="Sonata\Component\Invoice\InvoiceInterface", "groups"="sonata_api_read"}
  * )
  *
  * @QueryParam(name="page", requirements="\d+", default="1", description="Page for invoices list pagination (1-indexed)")
  * @QueryParam(name="count", requirements="\d+", default="10", description="Number of invoices by page")
  * @QueryParam(name="orderBy", array=true, requirements="ASC|DESC", nullable=true, strict=true, description="Query invoices invoice by clause (key is field, value is direction")
  * @QueryParam(name="status", requirements="\d+", nullable=true, strict=true, description="Filter on invoice statuses")
  *
  * @View(serializerGroups="sonata_api_read", serializerEnableMaxDepthChecks=true)
  *
  * @param ParamFetcherInterface $paramFetcher
  *
  * @return InvoiceInterface[]
  */
 public function getInvoicesAction(ParamFetcherInterface $paramFetcher)
 {
     $supportedFilters = array('status' => "");
     $page = $paramFetcher->get('page') - 1;
     $count = $paramFetcher->get('count');
     $orderBy = $paramFetcher->get('orderBy');
     $filters = array_intersect_key($paramFetcher->all(), $supportedFilters);
     foreach ($filters as $key => $value) {
         if (null === $value) {
             unset($filters[$key]);
         }
     }
     return $this->invoiceManager->findBy($filters, $orderBy, $count, $page);
 }