return asDocMeta().version();
    }

    public void setVersionNo(final Long version) {
        asDocMeta().version(version);
    }

    public org.codelibs.fess.crawler.client.http.RequestHeader getCrawlerRequestHeader() {
        return new org.codelibs.fess.crawler.client.http.RequestHeader(getName(), getValue());
    }

    public WebConfig getWebConfig() {
        if (webConfig == null) {

        final List<org.codelibs.fess.crawler.client.http.RequestHeader> rhList = new ArrayList<>();
        for (final RequestHeader requestHeader : requestHeaderList) {
            rhList.add(requestHeader.getCrawlerRequestHeader());
        }
        paramMap.put(HcHttpClient.REQUERT_HEADERS_PROPERTY,
                rhList.toArray(new org.codelibs.fess.crawler.client.http.RequestHeader[rhList.size()]));