assertNotNull(res, "null classpath container after runtime transform");
        assertNotNull(res.getClasspath(), "null classpath after runtime transform");
        assertEquals(4, res.getClasspath().size(), "runtime classpath should have 4 entries");

        ArtifactMetadata md = res.getClasspath().get(3);
        assertEquals("1.1", md.getVersion(), "runtime artifact version should be 1.1");
    }

            spec.getSourceRoots().from(runtimeExtensions.flatMap(GradleKotlinDslRuntimeGeneratedSources::getGeneratedSources));
            spec.getClasspath().from(extension.getClasspath());
            spec.getClasspath().from(runtimeExtensions.flatMap(GradleKotlinDslRuntimeGeneratedSources::getGeneratedClasses));
            spec.getIncludes().from(extension.getSourceRoot().file("kotlin/Module.md"));

            return new MetadataGraph(getTree(), true, true);
        }
        return null;
    }
    // ----------------------------------------------------------------------------
    public ClasspathContainer getClasspath(ArtifactScopeEnum scope)
            throws MetadataGraphTransformationException, MetadataResolutionException {
        if (classpathTransformation == null) {
            return null;
        }

        }

        classpath.add(md);

        return this;
    }

    // -------------------------------------------------------------------------------------------
    public List<ArtifactMetadata> getClasspath() {
        return classpath;
    }

    // -------------------------------------------------------------------------------------------
    public MetadataTreeNode getClasspathAsTree() throws MetadataResolutionException {

     */
    public abstract ConfigurableFileCollection getKotlinDslSource();

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

    /**
     * A working directory to be used to stage documentation as its generated.
     * All of the sections of the documentation have working directories off of this one.
     */

            task.source(extension.getDocumentedSource().filter(f -> f.getName().endsWith(".java")));

            task.setClasspath(extension.getClasspath());

            // TODO: This should be in Javadoc task
            DirectoryProperty generatedJavadocDirectory = objects.directoryProperty();