*            {@link ModelProblem.Severity#ERROR}.
     * @param source The source of the problem, may be {@code null}.
     * @param lineNumber The one-based index of the line containing the error or {@code -1} if unknown.
     * @param columnNumber The one-based index of the column containing the error or {@code -1} if unknown.
     * @param exception The exception that caused this problem, may be {@code null}.
     */
    // mkleint: does this need to be public?

  }

  /** Returns an immutable sorted set containing a single element. */
  public static <E extends Comparable<? super E>> ImmutableSortedSet<E> of(E e1) {
    return new RegularImmutableSortedSet<>(ImmutableList.of(e1), Ordering.natural());
  }

  /**
   * Returns an immutable sorted set containing the given elements sorted by their natural ordering.

    //                                                                      ==============
    /**
     * Displays the main path mapping administration page.
     *
     * @param form the search form containing search criteria
     * @return HTML response for the path mapping list page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index(final SearchForm form) {
        return asListHtml();

    @Resource
    protected FessConfig fessConfig;

    /**
     * Retrieves a paginated list of failure URLs based on the provided pager criteria.
     *
     * @param failureUrlPager the pager containing search criteria and pagination settings
     * @return a list of FailureUrl entities matching the criteria
     */
    public List<FailureUrl> getFailureUrlList(final FailureUrlPager failureUrlPager) {

        return asListHtml();
    }

    /**
     * Lists elevate words with pagination support.
     *
     * @param pageNumber optional page number for pagination
     * @param form search form containing filter criteria
     * @return HTML response with elevate word list
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })

    /**
     * Retrieves stemmer override dictionary settings with pagination support.
     *
     * @param dictId the dictionary ID
     * @param body the search body containing pagination and filter parameters
     * @return JSON response containing list of stemmer override dictionary items
     */
    // GET /api/admin/dict/stemmerOverride/settings/{dictId}
    @Execute

    }

    /**
     * Creates a synonym item from the provided form data with validation.
     *
     * @param form the create form containing synonym data
     * @param hook the validation error hook for handling errors
     * @return OptionalEntity containing the created synonym item or empty if creation failed
     */
    protected OptionalEntity<SynonymItem> createSynonymItem(final CreateForm form, final VaErrorHook hook) {

    return new CopyOnWriteArrayList<>();
  }

  /**
   * Creates a {@code CopyOnWriteArrayList} instance containing the given elements.
   *
   * @param elements the elements that the list should contain, in order
   * @return a new {@code CopyOnWriteArrayList} containing those elements
   * @since 12.0
   */
  @J2ktIncompatible
  @GwtIncompatible // CopyOnWriteArrayList

   * ordering.
   *
   * @throws NullPointerException if any element is null
   */
  public static <E extends Comparable<? super E>> ImmutableSortedMultiset<E> of(
      E e1, E e2, E e3, E e4) {
    return copyOf(Ordering.natural(), Arrays.asList(e1, e2, e3, e4));
  }

  /**
   * Returns an immutable sorted multiset containing the given elements sorted by their natural

        }
        return OptionalEntity.empty();
    }

    /**
     * Creates a RelatedQuery entity from the provided form data.
     *
     * @param form the form containing the related query data
     * @return optional entity containing the related query data, or empty if creation fails
     */
    public static OptionalEntity<RelatedQuery> getRelatedQuery(final CreateForm form) {