public abstract class CompositeTestResults extends TestResultModel {
    private final CompositeTestResults parent;
    private int tests;
    private final Set<TestResult> failures = new TreeSet<TestResult>();
    private final Set<TestResult> ignored = new TreeSet<TestResult>();
    private long duration;

    protected CompositeTestResults(CompositeTestResults parent) {
        this.parent = parent;
    }

import spock.lang.Specification

import static org.gradle.api.tasks.testing.TestResult.ResultType.*

class CompositeTestResultsTest extends Specification {
    final CompositeTestResults results = new CompositeTestResults(null) {
        @Override
        String getTitle() {
            throw new UnsupportedOperationException()
        }

        @Override
        String getBaseUrl() {

                    buildOperationExecutor.runAll(new Action<BuildOperationQueue<HtmlReportFileGenerator<? extends CompositeTestResults>>>() {
                        @Override
                        public void execute(BuildOperationQueue<HtmlReportFileGenerator<? extends CompositeTestResults>> queue) {
                            queue.add(generator("index.html", model, new OverviewPageRenderer(), output));

package org.gradle.api.internal.tasks.testing.report;

import org.apache.commons.lang.StringUtils;

import java.util.*;

/**
 * The model for the test report.
 */
public class AllTestResults extends CompositeTestResults {
    private final Map<String, PackageTestResults> packages = new TreeMap<String, PackageTestResults>();

    public AllTestResults() {
        super(null);
    }

    @Override

import java.util.Collection;
import java.util.Map;
import java.util.TreeMap;

/**
 * The test results for a given package.
 */
public class PackageTestResults extends CompositeTestResults {
    private static final String DEFAULT_PACKAGE = "default-package";
    private final String name;
    private final Map<String, ClassTestResults> classes = new TreeMap<String, ClassTestResults>();

import org.gradle.internal.FileUtils;

import java.util.Collection;
import java.util.Set;
import java.util.TreeSet;

/**
 * Test results for a given class.
 */
public class ClassTestResults extends CompositeTestResults {
    private final long id;
    private final String name;
    private final String displayName;
    private final PackageTestResults packageResults;

import org.gradle.reporting.TabbedPageRenderer;
import org.gradle.reporting.TabsRenderer;

import java.io.IOException;
import java.net.URL;
import java.util.Set;

abstract class PageRenderer<T extends CompositeTestResults> extends TabbedPageRenderer<T> {
    private static final URL STYLE_URL = PageRenderer.class.getResource("style.css");

    private T results;
    private final TabsRenderer<T> tabsRenderer = new TabsRenderer<T>();

Class <org.gradle.api.internal.tasks.testing.report.CompositeTestResults> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (CompositeTestResults.java:0)