if (StringUtil.isNotBlank(content)) {
                    putResultDataBody(dataMap, titleField, documentHelper.getDigest(responseData, body, dataMap,
                            fessConfig.getCrawlerDocumentFileMaxTitleLengthAsInteger()));
                } else {
                    putResultDataBody(dataMap, titleField, fessConfig.getCrawlerDocumentFileNoTitleLabel());
                }

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

    /**
     * Get the value for the key 'crawler.document.file.max.digest.length'. <br>
     * The value is, e.g. 200 <br>
     * comment: Maximum length of file digest in documents.