.setWindowSize(fessConfig.getSuggestPopularWordWindowSizeAsInteger())
                                .setQueryFreqThreshold(fessConfig.getSuggestPopularWordQueryFreqAsInteger());
                popularWordsRequestBuilder.setSeed(baseSeed);
                stream(baseTags).of(stream -> stream.forEach(tag -> popularWordsRequestBuilder.addTag(tag)));

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getSuggestPopularWordQueryFreqAsInteger();

    /**
     * Get the value for the key 'suggest.min.hit.count'. <br>
     * The value is, e.g. 1 <br>