return this;
    }

    /**
     * Sets the window size for rescoring.
     * @param windowSize The window size.
     * @return This builder instance.
     */
    public PopularWordsRequestBuilder setWindowSize(final int windowSize) {
        request.setWindowSize(windowSize);
        return this;
    }

    /**
     * Adds an exclude word.
     * @param excludeWord The word to exclude.

    public void setSeed(final String seed) {
        this.seed = seed;
    }

    /**
     * Sets the window size for rescoring.
     * @param windowSize The window size.
     */
    public void setWindowSize(final int windowSize) {
        this.windowSize = windowSize;
    }

    /**
     * Adds a tag to filter by.
     * @param tag The tag.
     */
    public void addTag(final String tag) {

        if (StringUtil.isBlank(modelName)) {
            return null;
        }
        return new QueryRescorerBuilder(new StoredLtrQueryBuilder().modelName(modelName).params(params))
                .windowSize(fessConfig.getLtrWindowSize());
    }