/**
     * Source code root folders. Java, Groovy and Kotlin public API sources, including
     * generated code.
     */
    public abstract ConfigurableFileCollection getSourceRoots();

    /**
     * Kotlin DSL source code to be documented. This should be the "public" Kotlin APIs,
     * including generated code.
     */
    public abstract ConfigurableFileCollection getKotlinDslSource();

        kotlinSourceSet.register("kotlin_dsl", spec -> {
            spec.getDisplayName().set("DSL");
            spec.getSourceRoots().from(extension.getKotlinDslSource());
            spec.getSourceRoots().from(runtimeExtensions.flatMap(GradleKotlinDslRuntimeGeneratedSources::getGeneratedSources));
            spec.getClasspath().from(extension.getClasspath());

        sourcesPath.setCanBeConsumed(false);
        sourcesPath.setCanBeResolved(true);
        sourcesPath.extendsFrom(runtimeClasspath);

        extension.getClasspath().from(runtimeClasspath);
        extension.getSourceRoots().from(sourcesPath.getIncoming().artifactView(v -> v.lenient(true)).getFiles());
        extension.getDocumentedSource().from(sourcesPath.getIncoming().artifactView(v -> v.lenient(true)).getFiles().getAsFileTree().matching(f -> {