Return the content identifier for the provided content object for
debugging purposes.
Parameters
object $content A content instance:
Return value
string|null $id id of the content object or null if unable to determine an id
File
 
   - drupal/core/vendor/symfony-cmf/routing/Symfony/Cmf/Component/Routing/ContentRepositoryInterface.php, line 36
Class
  
  - ContentRepositoryInterface 
- Interface used by the DynamicRouter to retrieve content by it's id when
generating routes from content-id.
Namespace
  Symfony\Cmf\Component\Routing
Code
public function getContentId($content);