}
    if (refreshTimeUnit != null) {
      builder.refreshAfterWrite(refreshDuration, refreshTimeUnit);
    }

    return builder;
  }

  /**
   * Returns a string that can be used to parse an equivalent {@code CacheBuilderSpec}. The order
   * and form of this representation is not guaranteed, except that reparsing its output will
   * produce a {@code CacheBuilderSpec} equal to this instance.
   */

    }
    if (refreshTimeUnit != null) {
      builder.refreshAfterWrite(refreshDuration, refreshTimeUnit);
    }

    return builder;
  }

  /**
   * Returns a string that can be used to parse an equivalent {@code CacheBuilderSpec}. The order
   * and form of this representation is not guaranteed, except that reparsing its output will
   * produce a {@code CacheBuilderSpec} equal to this instance.
   */