void updateCache(long page, DirectBufferWrapper byteBufferWrapper) {
    if (myLastBuffer != null && myLastBuffer.myLastPage != page) {
      myLastBuffer3 = myLastBuffer2;
      myLastBuffer2 = myLastBuffer;
    }
    myLastBuffer = new CachedBuffer(byteBufferWrapper, page);
  }
void updateCache(long page, DirectBufferWrapper byteBufferWrapper)