return ChecksumType.ADLER_32.hashFunction;
  }

  @Immutable
  enum ChecksumType implements ImmutableSupplier<Checksum> {
    CRC_32("Hashing.crc32()") {
      @Override
      public Checksum get() {
        return new CRC32();
      }
    },
    ADLER_32("Hashing.adler32()") {
      @Override
      public Checksum get() {
        return new Adler32();
      }
    };

      }
      while (bb.remaining() >= 16) {
        crc0 = computeForWord(crc0);
        crc1 = computeForWord(crc1);
        crc2 = computeForWord(crc2);
        crc3 = computeForWord(crc3);
        crc0 ^= bb.getInt();
        crc1 ^= bb.getInt();
        crc2 ^= bb.getInt();
        crc3 ^= bb.getInt();
      }
    }

    @Override
    protected void processRemaining(ByteBuffer bb) {
      if (finished) {