eclipseProject.setProjectDependencies(classpathElements.getProjectDependencies());
            eclipseProject.setSourceDirectories(classpathElements.getSourceDirectories());
            eclipseProject.setClasspathContainers(classpathElements.getClasspathContainers());

            if (headerSourceSet.getExportedHeaders().getSourceDirectories().isEmpty()) {
                headerSourceSet.getExportedHeaders().srcDir("src/" + headerSourceSet.getParentName() + "/headers");
            }

            headerSourceSet.getImplicitHeaders().setSrcDirs(headerSourceSet.getSource().getSourceDirectories());
            headerSourceSet.getImplicitHeaders().include("**/*.h");
        }

    @Override
    public void setSource(Object source) {
        super.setSource(source);
        if (source instanceof SourceDirectorySet) {
            this.sourceSetDirectories = ((SourceDirectorySet) source).getSourceDirectories();
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    @Internal("tracked via stableSources")
    public FileTree getSource() {
        return super.getSource();

        this.classesDirectory = defaultSourceSet.classesDirectory;
    }

    @Override
    public String getName() {
        return this.name;
    }

    @Override
    public FileCollection getSourceDirectories() {
        return dirs;
    }

    @Override
    public Set<File> getSrcDirs() {
        Set<File> dirs = new LinkedHashSet<>();
        for (DirectoryTree tree : getSrcDirTrees()) {

        testing.getSuites().withType(JvmTestSuite.class).configureEach(suite -> {
            ideaModule.getTestSources().from(suite.getSources().getAllJava().getSourceDirectories());
            ideaModule.getTestResources().from(suite.getSources().getResources().getSourceDirectories());
        });
    }

    private void configureIdeaModuleForWar(final Project project) {

            // Only apply default locations when none explicitly configured
            if (languageSourceSet.getSource().getSourceDirectories().isEmpty()) {
                File baseDir = projectIdentifier.getProjectDir();

        variant.extendsFrom(getImplementationConfiguration());

        jvmPluginServices.configureAsSources(variant);

        variant.getOutgoing().artifacts(
            getSourceSet().getAllSource().getSourceDirectories().getElements().flatMap(e -> project.provider(() -> e)),
            artifact -> artifact.setType(ArtifactTypeDefinition.DIRECTORY_TYPE)
        );
    }

** link:{groovyDslPath}/org.gradle.testing.jacoco.tasks.JacocoReport.html#org.gradle.testing.jacoco.tasks.JacocoReport:sourceDirectories[sourceDirectories] - use `getSourceDirectories().setFrom()` instead.
** link:{groovyDslPath}/org.gradle.testing.jacoco.tasks.JacocoReport.html#org.gradle.testing.jacoco.tasks.JacocoReport:classDirectories[classDirectories] - use `getClassDirectories().setFrom()` instead.

==== Changes in the IDEA model

The `getGeneratedSourceDirectories()` and `getGeneratedTestDirectories()` methods are removed from the `IdeaContentRoot` interface.
Clients should replace these invocations with `getSourceDirectories()` and `getTestDirectories()` and use the `isGenerated()` method on the returned instances.

[[locking_single]]
=== Dependency locking now defaults to a single file per project