code: protected boolean throttleRequest(final HttpServletRequest request, final HttpServletResponse response) {
          return configurationContext.getThrottledRequestExecutor() != null
              && configurationContext.getThrottledRequestExecutor().throttle(request, response);
      }
docs: Is request throttled.
  
  @param request  the request
  @param response the response
  @return true if the request is throttled. False otherwise, letting it proceed.