*/
  @SuppressWarnings("IdentifierName") // the best we could do for adjacent digit blocks
  public static HashFunction murmur3_128() {
    return Murmur3_128HashFunction.MURMUR3_128;
  }

  /**
   * Returns a hash function implementing the <a href="https://131002.net/siphash/">64-bit
   * SipHash-2-4 algorithm</a> using a seed value of {@code k = 00 01 02 ...}.

   */
  @SuppressWarnings("IdentifierName") // the best we could do for adjacent digit blocks
  public static HashFunction murmur3_128() {
    return Murmur3_128HashFunction.MURMUR3_128;
  }

  /**
   * Returns a hash function implementing the <a href="https://131002.net/siphash/">64-bit
   * SipHash-2-4 algorithm</a> using a seed value of {@code k = 00 01 02 ...}.

     */
    protected static final String[] timestampFields = { LAST_MODIFIED, CREATE_TIME };

    /**
     * Hash function for generating IDs.
     */
    protected static final HashFunction murmur3Hash = Hashing.murmur3_128(0);

    /**
     * FesenClient instance.
     */
    @Resource
    protected volatile FesenClient fesenClient;

    /**
     * Index name.
     */
    protected String index;