* The value is, e.g. content,title <br>
     * comment: Index contents for suggestion.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getSuggestFieldIndexContents();

    /**
     * Get the value for the key 'suggest.update.request.interval'. <br>
     * The value is, e.g. 0 <br>
     * comment: Interval for suggestion update requests.