NamedDomainObjectContainer<Jdk> jdksContainer = project.container(Jdk.class, name -> {
            Configuration configuration = project.getConfigurations().create("jdk_" + name);
            configuration.setCanBeConsumed(false);
            configuration.getAttributes().attribute(ArtifactAttributes.ARTIFACT_FORMAT, ArtifactTypeDefinition.DIRECTORY_TYPE);
            configuration.getAttributes().attribute(jdkAttribute, true);

            a.attribute(DocsType.DOCS_TYPE_ATTRIBUTE, objects.named(DocsType.class, "gradle-source-folders"));
        });
        sourcesPath.setCanBeConsumed(false);
        sourcesPath.setCanBeResolved(true);
        sourcesPath.extendsFrom(runtimeClasspath);

        extension.getClasspath().from(runtimeClasspath);