private static long packValues(long deltaUpToRoot, boolean allDeltaUpToRootAreNull, int modCount) {
      return deltaUpToRoot << 33 | (allDeltaUpToRootAreNull ? 0x100000000L : 0) | modCount;
    }
private static long packValues(long deltaUpToRoot, boolean allDeltaUpToRootAreNull, int modCount)