code: public void notifyObserversOfRequestCancellation(CachedSpiceRequest<?> request) {
          RequestProcessingContext requestProcessingContext = new RequestProcessingContext();
          requestProcessingContext.setExecutionThread(Thread.currentThread());
          post(new RequestCancelledNotifier(request, spiceServiceListenerList, requestProcessingContext));
      }
docs: Notify interested observers that the request was cancelled.
  @param request the request that was cancelled.