code: public function getUrlById($id)
      {
          foreach ($this->links as $link) {
              if ($link->getAttribute('id') === (string) $id) {
                  return $this->getUrlFromLink($link);
              }
          }
  
          return false;
      }
docs: Accessor for a URL by the id attribute.
  
  @param string $id       Id attribute of link.
  
  @return SimpleUrl       URL with that id of false if none.