final String requestsPerSecond = getReindexRequestsPerSecound(fessConfig);
        final String scroll = StringUtil.isNotBlank(fessConfig.getIndexReindexScroll()) ? fessConfig.getIndexReindexScroll() : null;
        final String maxDocs = StringUtil.isNotBlank(fessConfig.getIndexReindexMaxDocs()) ? fessConfig.getIndexReindexMaxDocs() : null;

     * The value is, e.g. 5m <br>
     * comment: Scroll timeout for reindex operations.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexReindexScroll();

    /**
     * Get the value for the key 'index.reindex.max_docs'. <br>
     * The value is, e.g.  <br>
     * comment: Maximum number of documents for reindex operations.