return requestHeaderBhv.selectList(cb -> {
            cb.query().setWebConfigId_Equal(webConfigId);
            cb.fetchFirst(fessConfig.getPageRequestHeaderMaxFetchSizeAsInteger());
        });
    }

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

    /**
     * Get the value for the key 'page.scheduled.job.max.fetch.size'. <br>
     * The value is, e.g. 100 <br>