code: public synchronized void extendTTL(K strKey) {
  		TTLObject<K, E> object = getTTLObject(strKey);
  		if(object != null) {
  			object.setLifeExpectancy(System.currentTimeMillis() + object.getTtl());
  		}
  	}
docs: Extends the ttl of the object with the given key with the current system time.
  @param strKey