System.out.println("      " + dir);
                    }

                    System.out.println("    test dirs:");
                    for (IdeaSourceDirectory dir: root.getTestDirectories()) {
                        System.out.println("      " + dir);
                    }

                    System.out.println("    exclude dirs:");
                    for (File dir: root.getExcludeDirectories()) {

     */
    DomainObjectSet<? extends IdeaSourceDirectory> getSourceDirectories();

    /**
     * The set of test source directories.
     */
    DomainObjectSet<? extends IdeaSourceDirectory> getTestDirectories();

    /**
     * The set of resource directories.
     * NOTE: The resources directory is only available for Java projects, otherwise it is empty set.

        this.sourceDirectories = sourceDirectories;
        return this;
    }

    public Set<DefaultIdeaSourceDirectory> getTestDirectories() {
        return testDirectories;
    }

    public DefaultIdeaContentRoot setTestDirectories(Set<DefaultIdeaSourceDirectory> testDirectories) {
        this.testDirectories = testDirectories;
        return this;

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