code: @SuppressWarnings("unused")
      private static void releaseRenderer() 
      {
          if (log.isLoggable(Level.FINEST))
          {
              log.finest("releaseRenderer rendererMap -> " + delegateRendererMap.toString());
          }
          
          
          ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
          
          if (log.isLoggable(Level.FINEST))
          {
              log.finest("releaseRenderer classLoader -> " + classLoader.toString() );
              log.finest("releaseRenderer renderer -> " + delegateRendererMap.get(classLoader));
          }
          
          
          delegateRendererMap.remove(classLoader);
          
          if (log.isLoggable(Level.FINEST))
          {
              log.finest("releaseRenderer renderMap -> " + delegateRendererMap.toString());
          }
          
      }
docs: The idea of this method is to be called from AbstractFacesInitializer.