/**
  * @param SwimRenderingManagerInterface $manager
  *
  * @return $this
  */
 public function chainRendering(SwimRenderingManagerInterface $manager)
 {
     $manager->setWork($this->render($manager->getWork()));
     $manager->addAttributes($this->getAttributes());
     return $this;
 }
 /**
  * @param  $content string
  *
  * @return string
  */
 public function swimBook($content)
 {
     return $this->manager->render($content);
 }