*/
    @Size(max = 1000)
    public String sdh;

    /**
     * Parameter to control tracking of total hits in search results.
     */
    @Size(max = 100)
    public String track_total_hits;

    /**
     * Default constructor for SearchForm.
     */
    public SearchForm() {
        super();
    }

    // advance

    @Override
    public int getStartPosition() {

    /** Fess LLM log level configuration key. */
    public static final String FESS_LLM_LOG_LEVEL = "fess.llm.log.level";

    /** Track total hits configuration key. */
    public static final String TRACK_TOTAL_HITS = "track_total_hits";

    /** System property prefix for Fess configuration. */
    public static final String SYSTEM_PROP_PREFIX = "fess.system.";

    /** Configuration prefix for Fess settings. */

        /**
         * Sets the track total hits configuration.
         *
         * @param trackTotalHits the track total hits setting
         * @return this builder for method chaining
         */
        public SearchConditionBuilder trackTotalHits(final String trackTotalHits) {
            this.trackTotalHits = trackTotalHits;
            return this;
        }

        /**