/**
  * set a RenderResult in cache
  *
  * @param key
  * @param rr
  * @param ttl
  */
 public static void set(String key, RenderResult rr, String ttl) {
   int tl = Time.parseDuration(ttl) * 1000;
   CachedItemStatus cachedItemStatus = new CachedItemStatus(tl);
   cacheset(key, ttl, new CachedRenderResult(cachedItemStatus, rr));
   // cacheTacker.put(key, cachedItemStatus);
 }