code: @Override
      public CacheKey getCacheKey(HttpServletRequest request, HttpServletResponse response) {
          // Initiating rendering of portlets will change the stream at all
          return this.wrappedComponent.getCacheKey(request, response);
      }
docs: /* (non-Javadoc)
  @see org.apereo.portal.rendering.PipelineComponent#getCacheKey(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)