code: @RequestMapping(value = "/bulk/sync", method = RequestMethod.POST,
              produces = "application/pdf", consumes = "text/json")
      public ResponseEntity<byte[]> renderBulk(@RequestBody List<UkasePayload> payloads) throws InterruptedException {
          return ResponseEntity.ok(asyncManager.processOrder(payloads));
      }
docs: /*================================================================================================================
  ============================================== bulk/async API controllers =======================================
  =================================================================================================================