return redirectToLogin();
        }

        final Map<String, Object> doc =
                searchHelper.getDocumentByDocId(form.docId, queryFieldConfig.getResponseFields(), getUserBean()).orElse(null);
        final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldThumbnail(), String.class);
        if (StringUtil.isBlank(form.queryId) || StringUtil.isBlank(url) || !thumbnailSupport) {
            // 404

     */
    @SuppressWarnings("unchecked")
    public static <T> T getObject(final String name) {
        return LaRequestUtil.getOptionalRequest().map(req -> (T) req.getAttribute(name)).orElse(null);
    }

    /**
     * Sets an error in the current request with the specified status code and message.
     *
     * @param statusCode The HTTP status code
     * @param message The error message
     */

            form.seqNo = (Long) entity.remove(fessConfig.getIndexFieldSeqNo());
            form.primaryTerm = (Long) entity.remove(fessConfig.getIndexFieldPrimaryTerm());
        }).orElse(() -> {
            throwValidationError(messages -> messages.addErrorsCrudCouldNotFindCrudTable(GLOBAL, form.id), this::asListHtml);
        });
        saveToken();
        return asEditHtml();
    }

    /**

        Document doc = Document.of(pomXml);
        Element root = doc.root();
        Element dependencies = root.child("dependencies").orElse(null);
        assertNotNull(dependencies, "dependencies should exist");
        Element dependency = dependencies.child("dependency").orElse(null);
        assertNotNull(dependency, "dependency should exist");

        // Insert elements in dependency according to dependency ordering

                    messages.addErrorsNoUserForChangingPassword(GLOBAL);
                }, validationErrorLambda);
                return null;
            });
        }).orElse(() -> {
            throwValidationError(messages -> {
                messages.addErrorsLoginError(GLOBAL);
            }, validationErrorLambda);
        });
    }

    /**

            UpgradeOptions options = context.options();
            if (options.modelVersion().isPresent()) {
                return options.modelVersion().get();
            } else if (options.all().orElse(false)) {
                return "4.1.0";
            } else {
                return "4.0.0";
            }
        }

        public boolean testIsPluginsEnabled(UpgradeContext context) {

        }
        buf.append("; charset=");
        final String enc;
        if (encoding == null) {
            enc = LaRequestUtil.getOptionalRequest().map(HttpServletRequest::getCharacterEncoding).orElse(Constants.UTF_8);
        } else {
            enc = encoding;
        }
        buf.append(enc);
        final HttpServletResponse response = LaResponseUtil.getResponse();

   * iterable is empty.
   *
   * <p><b>Java 8+ users:</b> the {@code Stream} equivalent to this method is {@code
   * stream.collect(MoreCollectors.toOptional()).orElse(defaultValue)}.
   *
   * @throws IllegalArgumentException if the iterator contains multiple elements
   */
  @ParametricNullness
  public static <T extends @Nullable Object> T getOnlyElement(

            return redirectToLogin();
        }

        Map<String, Object> doc = null;
        try {
            doc = searchHelper.getDocumentByDocId(form.docId, queryFieldConfig.getCacheResponseFields(), getUserBean()).orElse(null);
        } catch (final Exception e) {
            logger.warn("Failed to request: {}", form.docId, e);
        }
        if (doc == null) {

  public static <T> @Nullable Optional<T> fromJavaUtil(
      java.util.@Nullable Optional<T> javaUtilOptional) {
    return (javaUtilOptional == null) ? null : fromNullable(javaUtilOptional.orElse(null));
  }

  /**
   * Returns the equivalent {@code java.util.Optional} value to the given {@code
   * com.google.common.base.Optional}, or {@code null} if the argument is null.
   *