//                                                                           =========
    protected final SqlClause _sqlClause = new EsSqlClause(asTableDbName());
    protected int _safetyMaxResultSize;
    protected SearchRequestParams _searchRequestParams = new SearchRequestParams();
    protected String _preference;

    // ===================================================================================

    //                                                                           =========
    protected final SqlClause _sqlClause = new EsSqlClause(asTableDbName());
    protected int _safetyMaxResultSize;
    protected SearchRequestParams _searchRequestParams = new SearchRequestParams();
    protected String _preference;

    // ===================================================================================

  }

  protected final K k0() {
    return e0().getKey();
  }

  protected final V v0() {
    return e0().getValue();
  }

  protected final K k1() {
    return e1().getKey();
  }

  protected final V v1() {
    return e1().getValue();
  }

  protected final K k2() {
    return e2().getKey();
  }

  public static final class DoublesAsListGenerator extends TestDoubleListGenerator {
    @Override
    protected List<Double> create(Double[] elements) {
      return asList(elements);
    }
  }

  public static final class DoublesAsListHeadSubListGenerator extends TestDoubleListGenerator {
    @Override
    protected List<Double> create(Double[] elements) {
      Double[] suffix = {Double.MIN_VALUE, Double.MAX_VALUE};

    super(false, false, true, true, true);
  }

  @Override
  protected SortedMap<String, String> makeEmptyMap() {
    TreeBasedTable<String, String, String> table = TreeBasedTable.create();
    table.put("a", "b", "c");
    table.put("c", "b", "a");
    table.put("a", "a", "d");
    return table.row("b");
  }

  @Override
  protected SortedMap<String, String> makePopulatedMap() {

    /**
     * Default initial capacity.
     */
    protected static final int DEFAULT_INITIAL_CAPACITY = 16;

    /**
     * Default load factor.
     */
    protected static final float DEFAULT_LOAD_FACTOR = 0.75f;

    /**
     * Upper limit on the number of entries.
     */
    protected final int limitSize;

    /**
     * Creates an {@link LruHashMap}.
     *

  protected Collection<Method> suppressForSynchronizedNavigableMap() {
    return emptySet();
  }

  protected Collection<Method> suppressForTreeMapNatural() {
    return emptySet();
  }

  protected Collection<Method> suppressForTreeMapWithComparator() {
    return emptySet();
  }

  protected Collection<Method> suppressForUnmodifiableMap() {
    return emptySet();
  }

    /** The separator for text content. */
    protected static final String TEXT_SEP = " ";

    /** The suggester instance for handling suggest operations. */
    protected Suggester suggester;

    /** The Fess configuration for accessing system settings. */
    protected FessConfig fessConfig;

    /** The set of field names for content. */
    protected final Set<String> contentFieldNameSet = new HashSet<>();

    /** The list of documents returned by the search query. */
    protected final List<Map<String, Object>> documentList;

    /** The total number of records that match the search criteria. */
    protected final long allRecordCount;

    /** The relation type indicating how the record count should be interpreted (e.g., "eq", "gte"). */
    protected final String allRecordCountRelation;

    /** numOfThread */
    protected Integer numOfThread;

    /** paths */
    protected String paths;

    /** permissions */
    protected String[] permissions;

    /** sortOrder */
    protected Integer sortOrder;

    /** timeToLive */
    protected Integer timeToLive;

    /** updatedBy */
    protected String updatedBy;

    /** updatedTime */
    protected Long updatedTime;