original_string: public function extractId($routeName)
      {
          if (!$this->supports($routeName)) {
              return null;
          }
  
          return (int) str_replace($this->getPrefix(), '', $routeName);
      }
code: public function extractId($routeName)
      {
          if (!$this->supports($routeName)) {
              return null;
          }
  
          return (int) str_replace($this->getPrefix(), '', $routeName);
      }
code_tokens: public function extractId ( $ routeName ) { if ( ! $ this -> supports ( $ routeName ) ) { return null ; } return ( int ) str_replace ( $ this -> getPrefix ( ) , '' , $ routeName ) ; }
docstring: Extract a page id from the route name
  
  @param string $routeName
  
  @return int|null
docstring_tokens: Extract a page id from the route name