* Get the value for the key 'index.export.format'. <br>
     * The value is, e.g. html <br>
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexExportFormat();

    /**
     * Get the value for the key 'log.notification.flush.interval'. <br>
     * The value is, e.g. 30 <br>
     * comment: <br>
     * Log Notification<br>