// TODO html4 output was removed in Java 13, see https://bugs.openjdk.org/browse/JDK-8215578
                options.addBooleanOption("html4", true);
                options.addBooleanOption("-no-module-directories", true);

                FileSystemOperations fs = getFs();
                //noinspection Convert2Lambda
                task.doLast(new Action<Task>() {
                    @Override

                }
            }
        }
    }

    private boolean hasMethods(ClassDoc classDoc) {
        boolean hasMethods = false;
        if (!classDoc.getClassMethods().isEmpty()) {
            hasMethods = true;
        }
        for (ClassExtensionDoc extensionDoc : classDoc.getClassExtensions()) {
            hasMethods |= !extensionDoc.getExtensionMethods().isEmpty();
        }
        return hasMethods;
    }

            if (prefix.charAt(i) != input.charAt(cpos)) {
                return false;
            }
            i++;
            cpos++;
        }
        return true;
    }

    public boolean lookingAt(Pattern pattern) {
        Matcher m = pattern.matcher(input);
        m.region(pos, input.length());
        return m.lookingAt();
    }

    public String region() {

        try {
            for (String line : Files.readAllLines(referencedFile.toPath())) {
                if (line.contains(text)) {
                    return true;
                }
            }
        } catch (IOException e) {
            // ignore
        }
        return false;
    }

    private String getFileName(String match, File currentFile) {

            attributes.put("doctype", "book");
            attributes.put("imagesdir", "img");
            attributes.put("nofooter", true);
            attributes.put("sectanchors", true);
            attributes.put("sectlinks", true);
            attributes.put("linkattrs", true);
            attributes.put("reproducible", "");
            attributes.put("docinfo", "");
            attributes.put("lang", "en-US");

            annotationNames.set(i, transformer.transform(annotationNames.get(i)));
        }
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        AbstractLanguageElement that = (AbstractLanguageElement) o;

                td.appendChild(caution);
                caution.appendChild(document.createTextNode("Incubating"));
            }
            td.appendChild(document.importNode(blockDoc.getDescription(), true));
        }
    }

    }

    private void parseStartElement(TokenVisitor visitor) {
        // start element marker
        scanner.next();
        boolean isEnd = false;
        if (scanner.lookingAt('/')) {
            isEnd = true;
            scanner.next();
        }

        // element name
        scanner.skip(WHITESPACE_WITH_EOL);
        scanner.mark();
        scanner.find(END_ELEMENT_NAME);

        this.arrayDimensions = arrayDimensions;
        return this;
    }

    public boolean isVarargs() {
        return varargs;
    }

    public TypeMetaData setVarargs() {
        this.varargs = true;
        return this;
    }

    public List<TypeMetaData> getTypeArgs() {
        return typeArgs;
    }

    public TypeMetaData getRawType() {
        if (wildcard || lowerBounds != null) {

            throw new GradleException("filter isn't ready to transform");
        }

        Document document = Jsoup.parse(CharStreams.toString(in));
        document.outputSettings().indentAmount(2).prettyPrint(true);
        document.prependChild(new DocumentType("html", "", ""));
        document.head().
                append("<meta charset='utf-8'>").