*
   * @since 18.0
   */
  public static HashFunction crc32c() {
    return Crc32CSupplier.HASH_FUNCTION;
  }

  @Immutable
  private enum Crc32CSupplier implements ImmutableSupplier<HashFunction> {
    @J2ObjCIncompatible
    JAVA_UTIL_ZIP {
      @Override
      public HashFunction get() {
        return ChecksumType.CRC_32C.hashFunction;
      }
    },

   *
   * @since 14.0
   */
  public static HashFunction adler32() {
    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