public class GradleUserManualPlugin implements Plugin<Project> {

    public static final String DOCS_GRADLE_ORG = "https://docs.gradle.org/";

    @Override
    public void apply(Project project) {
        ProjectLayout layout = project.getLayout();
        TaskContainer tasks = project.getTasks();

        GradleDocumentationExtension extension = project.getExtensions().getByType(GradleDocumentationExtension.class);

            return property.getAsFile().get();
        }
        return null;
    }

    private Configuration resolveJaxb() {
        Project project = getProject();
        DependencyHandler dependencies = project.getDependencies();
        return project.getConfigurations().detachedConfiguration(
                dependencies.create("javax.xml.bind:jaxb-api:2.3.0"),