original_string: public function url($url = null)
      {
          if ($url === null) {
              return $this->_url;
          }
          $this->_url = $url;
  
          return $this;
      }
code: public function url($url = null)
      {
          if ($url === null) {
              return $this->_url;
          }
          $this->_url = $url;
  
          return $this;
      }
code_tokens: public function url ( $ url = null ) { if ( $ url === null ) { return $ this -> _url ; } $ this -> _url = $ url ; return $ this ; }
docstring: Get or set the url.
  
  @param null|array $url
  @return MenuItem|array
docstring_tokens: Get or set the url .