TestDomainObject example

public function cacheableResponse() {
    return new CacheableTestResponse('Hello world!');
  }

  public function cacheableResponseEarly() {
    $render_array = $this->earlyRenderContent();
    return new CacheableTestResponse($this->renderer->render($render_array));
  }

  public function domainObject() {
    return new TestDomainObject();
  }

  public function domainObjectEarly() {
    $render_array = $this->earlyRenderContent();
    $this->renderer->render($render_array);
    return new TestDomainObject();
  }

  public function domainObjectWithAttachments() {
    return new AttachmentsTestDomainObject();
  }