final SetOnce<Map<String, Object>> initParamMapSet = new SetOnce<>();
        WebConfig webConfig = new WebConfig();
        webConfig.setUserAgent(Constants.CRAWLING_USER_AGENT_PREFIX + "1.0" + Constants.CRAWLING_USER_AGENT_SUFFIX);
        CrawlerClientFactory crawlerClientFactory = webConfig.initializeClientFactory(() -> new CrawlerClientFactory() {

        this.updatedTime = value;
    }

    public String getUserAgent() {
        checkSpecifiedProperty("userAgent");
        return convertEmptyToNull(userAgent);
    }

    public void setUserAgent(String value) {
        registerModifiedProperty("userAgent");
        this.userAgent = value;
    }