private void clear() {
    for(int i = 0; i < myIdToStringCache.length; ++i) {
      myStripeLocks[i].lock();
      try {
        myIdToStringCache[i].clear();
        myHashcodeToIdCache[i].clear();
      }
      finally {
        myStripeLocks[i].unlock();
      }
    }
  }
private void clear()