project.getPlugins().apply(JavaBasePlugin.class);
        JavaPluginExtension extension = project.getExtensions().getByType(JavaPluginExtension.class);

        SourceSet testFixturesSourceSet = extension.getSourceSets().maybeCreate(TEST_FIXTURES_FEATURE_NAME);

        JvmFeatureInternal feature = new DefaultJvmFeature(
            TEST_FIXTURES_FEATURE_NAME,
            testFixturesSourceSet,

        project.getExtensions().getByType(JavaPluginExtension.class).getSourceSets().all(
            new Action<SourceSet>() {
                @Override
                public void execute(final SourceSet sourceSet) {
                    // for each source set we will:

    public abstract void setTestReportDirName(String testReportDirName);

    /**
     * The source sets container.
     */
    public abstract SourceSetContainer getSourceSets();

    public abstract ProjectInternal getProject();

    /**
     * If this method is called, Gradle will not automatically try to fetch
     * dependencies which have a JVM version compatible with this module.

            });
        });
    }

    private void configureSourceSetDefaults(Project project) {
        javaPluginExtension(project).getSourceSets().all(sourceSet -> {

            GroovySourceDirectorySet groovySource = getGroovySourceDirectorySet(sourceSet);
            sourceSet.getExtensions().add(GroovySourceDirectorySet.class, "groovy", groovySource);

        private Multimap<String, String> collectLibraryToSourceSetMapping() {
            Multimap<String, String> pathToSourceSetNames = LinkedHashMultimap.create();
            Iterable<SourceSet> sourceSets = classpath.getSourceSets();

            // for non-java projects there are no source sets configured
            if (sourceSets == null) {
                return pathToSourceSetNames;
            }

public class SourceFoldersCreator {

    public List<SourceFolder> createSourceFolders(final EclipseClasspath classpath) {

        List<SourceFolder> sourceFolders = configureProjectRelativeFolders(classpath.getSourceSets(),
            classpath.getTestSourceSets().getOrElse(emptySet()),
            input-> classpath.getProject().relativePath(input),
            classpath.getDefaultOutputDir(),

     *
     * @since 7.1
     */
    Manifest manifest(Action<? super Manifest> action);

    /**
     * The source sets container.
     *
     * @since 7.1
     */
    SourceSetContainer getSourceSets();

    /**
     * Tells if automatic JVM targeting is enabled. When disabled, Gradle
     * will not automatically try to get dependencies corresponding to the

    }

    private Set<File> getMainSourceDirs(Project project) {
        return project.getExtensions().getByType(JavaPluginExtension.class).getSourceSets().getByName("main").getAllSource().getSrcDirs();
    }

    private String toJavaFacetVersion(JavaVersion version) {
        if (version.equals(JavaVersion.VERSION_1_5)) {
            return "5.0";
        }

        });
    }

    private void configureSourceSetDefaults(final ProjectInternal project, Category incrementalAnalysisCategory, final Usage incrementalAnalysisUsage) {
        javaPluginExtension(project).getSourceSets().all(sourceSet -> {

            ScalaSourceDirectorySet scalaSource = getScalaSourceDirectorySet(sourceSet);
            sourceSet.getExtensions().add(ScalaSourceDirectorySet.class, "scala", scalaSource);

    }

    /**
     * The source sets to be added.
     * <p>
     * See {@link EclipseClasspath} for an example.
     */
    public Iterable<SourceSet> getSourceSets() {
        return sourceSets;
    }

    public void setSourceSets(Iterable<SourceSet> sourceSets) {
        this.sourceSets = sourceSets;
    }

    /**