* @return ActionResponse containing the thumbnail image or 404 if not found
     */
    @Execute
    public ActionResponse index(final ThumbnailForm form) {
        validate(form, messages -> {}, () -> asHtml(virtualHost(path_Error_ErrorJsp)));
        if (isLoginRequired()) {
            return redirectToLogin();
        }

        final Map<String, Object> doc =

    }

    // Helper methods

    private RelatedQuery createRelatedQuery(String term, String[] queries, String virtualHost) {
        RelatedQuery entity = new RelatedQuery();
        entity.setTerm(term);
        entity.setQueries(queries);
        entity.setVirtualHost(virtualHost);
        return entity;
    }

    // Mock classes

    static class MockRelatedQueryBhv extends RelatedQueryBhv {

            doColumn("updatedBy");
        }

        public void columnUpdatedTime() {
            doColumn("updatedTime");
        }

        public void columnVirtualHost() {
            doColumn("virtualHost");
        }
    }

     * @throws IOException if an I/O error occurs during content retrieval
     */
    @Execute
    public ActionResponse index(final GoForm form) throws IOException {
        validate(form, messages -> {}, () -> asHtml(virtualHost(path_Error_ErrorJsp)));
        if (isLoginRequired()) {
            return redirectToLogin();
        }

        Map<String, Object> doc = null;
        try {
            doc = searchHelper

        }

        public void columnUserSessionId() {
            doColumn("userSessionId");
        }

        public void columnVirtualHost() {
            doColumn("virtualHost");
        }
    }

     *
     * @return HTML response for login page or redirect to admin interface
     */
    protected HtmlResponse getHtmlResponse() {
        return getUserBean().map(this::redirectByUser).orElse(asHtml(virtualHost(path_Login_IndexJsp)));
    }

    /**
     * Redirects an authenticated user to the appropriate admin interface based on their roles.

     * @return ActionResponse containing the cached document content or error redirect
     */
    @Execute
    public ActionResponse index(final CacheForm form) {
        validate(form, messages -> {}, () -> asHtml(virtualHost(path_Error_ErrorJsp)));
        if (isLoginRequired()) {
            return redirectToLogin();
        }

        Map<String, Object> doc = null;
        try {

            result.setUpdatedBy(DfTypeUtil.toString(source.get("updatedBy")));
            result.setUpdatedTime(DfTypeUtil.toLong(source.get("updatedTime")));
            result.setVirtualHost(DfTypeUtil.toString(source.get("virtualHost")));
            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();

            result.setUpdatedBy(DfTypeUtil.toString(source.get("updatedBy")));
            result.setUpdatedTime(DfTypeUtil.toLong(source.get("updatedTime")));
            result.setVirtualHost(DfTypeUtil.toString(source.get("virtualHost")));
            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();

            result.setUpdatedBy(DfTypeUtil.toString(source.get("updatedBy")));
            result.setUpdatedTime(DfTypeUtil.toLong(source.get("updatedTime")));
            result.setVirtualHost(DfTypeUtil.toString(source.get("virtualHost")));
            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();