code: public static PageFlowController getNestingPageFlow( HttpServletRequest request )
      {
          ServletContext servletContext = InternalUtils.getServletContext( request );
          return getNestingPageFlow( request, servletContext );
      }
docs: Get the {@link PageFlowController} that is nesting the current one.
  @deprecated Use {@link #getNestingPageFlow(HttpServletRequest, ServletContext)} instead.
  
  @param request the current HttpServletRequest.
  @return the nesting {@link PageFlowController}, or <code>null</code> if the current one
  is not being nested.