*/
    protected interface DefaultQueryBuilderFunction {
        /**
         * Applies the function to create a query builder for the specified field and boost.
         * @param field The field name.
         * @param boost The boost value.
         * @return The created query builder.
         */
        QueryBuilder apply(String field, float boost);
    }

  private final Stats yStats;
  private final double sumOfProductsOfDeltas;

  /**
   * Internal constructor. Users should use {@link PairedStatsAccumulator#snapshot}.
   *
   * <p>To ensure that the created instance obeys its contract, the parameters should satisfy the
   * following constraints. This is the callers responsibility and is not enforced here.
   *
   * <ul>

/**
 * An implementation-specific parameter class suitable for initializing {@link
 * ArrayBasedCharEscaper} or {@link ArrayBasedUnicodeEscaper} instances. This class should be used
 * when more than one escaper is created using the same character replacement mapping to allow the
 * underlying (implementation specific) data structures to be shared.
 *
 * <p>The size of the data structure used by ArrayBasedCharEscaper and ArrayBasedUnicodeEscaper is

    //                                                                       =============
    /**
     * Creates a user bean from the given user entity.
     *
     * @param user the user entity to create a bean from
     * @return the created user bean
     */
    @Override
    protected FessUserBean createUserBean(final FessUser user) {
        return new FessUserBean(user);
    }

   * references, which is particularly hard to quantify.
   */

  /** Creates an empty {@code CompactHashMap} instance. */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      CompactHashMap<K, V> create() {
    return new CompactHashMap<>();
  }

  /**
   * Creates a {@code CompactHashMap} instance, with a high enough "initial capacity" that it

    }

    /**
     * Internal method to create crawling configuration based on form data.
     * Determines whether to create a web or file crawler configuration.
     *
     * @param form the form containing crawling configuration data
     * @return the name of the created configuration
     */
    protected String crawlingConfigInternal(final CrawlingConfigForm form) {

    //                                         -------------
    /**
     * Creates a new label type.
     *
     * @param form the create form
     * @return HTML response after creation
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse create(final CreateForm form) {
        verifyCrudMode(form.crudMode, CrudMode.CREATE);
        validate(form, messages -> {}, this::asEditHtml);

    }

    @Override
    public List<Long> create(Object... elements) {
      Long[] array = new Long[elements.length];
      int i = 0;
      for (Object e : elements) {
        array[i++] = (Long) e;
      }
      return create(array);
    }

    /**
     * Creates a new collection containing the given elements; implement this method instead of
     * {@link #create(Object...)}.
     */

    //                                         -------------
    /**
     * Creates a new group.
     *
     * @param form the create form
     * @return HTML response after creation
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse create(final CreateForm form) {
        verifyCrudMode(form.crudMode, CrudMode.CREATE);
        validate(form, messages -> {}, this::asEditHtml);

        add(property, new UserMessage(CONSTRAINTS_DecimalMax_MESSAGE, value));
        return this;
    }

    /**
     * Add the created action message for the key 'constraints.DecimalMin.message' with parameters.
     * <pre>
     * message: {item} must be greater than {value}.
     * </pre>
     * @param property The property name for the message. (NotNull)
     * @param value The parameter value for message. (NotNull)