code: private static void continueChainNoWrapper( ServletRequest request, ServletResponse response, FilterChain chain )
          throws IOException, ServletException
      {
          //
          // Remove our request wrapper -- the page doesn't need to see this.
          //
          if ( request instanceof PageFlowRequestWrapper )
              request = ((PageFlowRequestWrapper)request).getHttpRequest();
  
          chain.doFilter( request, response );
      }
docs: Internal method used to handle cases where the filter should continue without processing the
  request by rendering a page associated with a page flow.
  
  @param request the request
  @param response the response
  @param chain the filter chain
  @throws IOException
  @throws ServletException