/**
  * Creates a crawler.
  *
  * This method returns null if the DomCrawler component is not available.
  *
  * @param string $uri     A URI
  * @param string $content Content for the crawler to use
  * @param string $type    Content type
  *
  * @return Crawler|null
  */
 protected function createCrawlerFromContent($uri, $content, $type)
 {
     return $this->subject->createCrawlerFromContent($uri, $content, $type);
 }