while (bb.hasRemaining()) {
        crc0 = (crc0 >>> 8) ^ BYTE_TABLE[(bb.get() ^ crc0) & 0xFF];
      }
      finished = true;
    }

    @Override
    protected HashCode makeHash() {
      if (!finished) {
        // processRemaining does teardown we always want to do -- the folding together of the four
        // rolling CRCs.  So we call it on an empty ByteBuffer if we didn't already.