@SuppressWarnings("unused")
  private static final class ChecksumMethodHandles {
    private static final @Nullable MethodHandle UPDATE_BB = updateByteBuffer();

    @IgnoreJRERequirement // https://github.com/mojohaus/animal-sniffer/issues/67
    static boolean updateByteBuffer(Checksum cs, ByteBuffer bb) {
      if (UPDATE_BB != null) {
        try {
          UPDATE_BB.invokeExact(cs, bb);
        } catch (Throwable e) {