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   * returned by this method.
   */
  // TODO(user): consider ByteString here, when that is available
  public abstract byte[] asBytes();

  /**
   * Copies bytes from this hash code into {@code dest}.
   *
   * @param dest the byte array into which the hash code will be written
   * @param offset the start offset in the data
   * @param maxLength the maximum number of bytes to write

    }

    /**
     * Adds a query rescorer for post-processing search results.
     * Query rescorers allow modification of search scores after the initial query execution.
     *
     * @param rescorer the query rescorer to add
     */
    public void addQueryRescorer(final QueryRescorer rescorer) {
        queryRescorerList.add(rescorer);
    }