code: private static void fireResponseReceivedEvent(OperationContext opContext, HttpURLConnection request,
              RequestResult result) {
          if (opContext.getResponseReceivedEventHandler().hasListeners()
                  || OperationContext.getGlobalResponseReceivedEventHandler().hasListeners()) {
              ResponseReceivedEvent event = new ResponseReceivedEvent(opContext, request, result);
              opContext.getResponseReceivedEventHandler().fireEvent(event);
              OperationContext.getGlobalResponseReceivedEventHandler().fireEvent(event);
          }
      }
docs: Fires events representing that a response has been received.