public function test()
 {
     self::assertInstanceOf(ContainerInterface::class, Services::container());
     self::assertTrue(is_array(Services::container()->get(ServiceId::CONFIG)));
     self::assertInstanceOf(RendererInterface::class, Services::renderer());
     self::assertInstanceOf(ResourceManager::class, Services::resourceManager());
 }
 /**
  * Returns renderer instance used to render template.
  *
  * @return RendererInterface
  */
 public function getRenderer()
 {
     if ($this->renderer === null) {
         $this->renderer = Services::renderer();
     }
     return $this->renderer;
 }