TestingExtension testing = project.getExtensions().getByType(TestingExtension.class);
            ExtensiblePolymorphicDomainObjectContainer<TestSuite> suites = testing.getSuites();
            suites.withType(JvmTestSuite.class).configureEach(jvmTestSuite -> {
                // jvm test suite source sets are marked as test on the Eclipse classpath

        ObjectFactory objectFactory
    ) {
        TestingExtension testing = extensions.findByType(TestingExtension.class);
        final NamedDomainObjectProvider<JvmTestSuite> testSuite = testing.getSuites().register(JvmTestSuitePlugin.DEFAULT_TEST_SUITE_NAME, JvmTestSuite.class, suite -> {
            final SourceSet testSourceSet = suite.getSources();

     */
    public BuildScriptBuilder fileComment(String comment) {
        headerCommentLines.addAll(splitComment(comment));
        return this;
    }

    public List<SuiteSpec> getSuites() {
        return new ArrayList<>(block.testing.suites);
    }

    private static List<String> splitComment(String comment) {
        return Splitter.on("\n").splitToList(comment.trim());
    }

Method <org.gradle.api.tasks.testing.testng.TestNGOptions.getSuiteXmlWriter()> does not have raw return type assignable to org.gradle.api.provider.Property in (TestNGOptions.java:0)
Method <org.gradle.api.tasks.testing.testng.TestNGOptions.getSuites(java.io.File)> does not have raw return type assignable to org.gradle.api.provider.Provider in (TestNGOptions.java:0)

        }

        @Override
        public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {
            ISuite suite = context.getSuite();
            List<IMethodInstance> filtered = new LinkedList<IMethodInstance>();
            for (IMethodInstance candidate : methods) {

        synchronized (lock) {
            Object id = idGenerator.generateId();
            testInternal = new DefaultTestSuiteDescriptor(id, iTestContext.getName());
            parentId = suiteId.get(iTestContext.getSuite());
            xmlTestIds.put(iTestContext.getCurrentXmlTest(), id);
            testId.put(iTestContext, testInternal.getId());
            for (ITestNGMethod method : iTestContext.getAllTestMethods()) {

ParallelComputer(boolean, boolean); public static org.junit.runner.Computer classes(); public static org.junit.runner.Computer methods(); private static org.junit.runner.Runner parallelize(org.junit.runner.Runner); public org.junit.runner.Runner getSuite(org.junit.runners.model.RunnerBuilder, Class[]) throws org.junit.runners.model.InitializationError; protected org.junit.runner.Runner getRunner(org.junit.runners.model.RunnerBuilder, Class) throws Throwable; } org/junit/experimental/categories/I...