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

    /**
     * The runtime classpath of the source code to be documented.
     */
    public abstract ConfigurableFileCollection getClasspath();

    /**

        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());