@Override
 public void unlockedPutNoReturn(K k, V v, int createTime, int customTTI, int customTTL) {
   lock.readLock().lock();
   try {
     activeDelegate.unlockedPutNoReturn(k, v, createTime, customTTI, customTTL);
   } finally {
     lock.readLock().unlock();
   }
 }