code: public Set<Entry<String, T>> entrySet() {
  		// prepare the container
  		HashSet<Entry<String, T>> set = new HashSet<Entry<String, T>>();
  		// add the set from our container
  		set.addAll(container.entrySet());
  		// add the set from our cache
  		set.addAll(cache.entrySet());
  		
  		return set;
  	}
docs: returns a merged entryset containing within both the container and cache entrysets