original_string: public function expires($var = null)
      {
          if ($var !== null) {
              $this->expires = $var;
          }
  
          return $this->expires ?? Grav::instance()['config']->get('system.pages.expires');
      }
code: public function expires($var = null)
      {
          if ($var !== null) {
              $this->expires = $var;
          }
  
          return $this->expires ?? Grav::instance()['config']->get('system.pages.expires');
      }
code_tokens: public function expires ( $ var = null ) { if ( $ var !== null ) { $ this -> expires = $ var ; } return $ this -> expires ?? Grav :: instance ( ) [ 'config' ] -> get ( 'system.pages.expires' ) ; }
docstring: Gets and sets the expires field. If not set will return the default
  
  @param  int $var The new expires value.
  
  @return int      The expires value
docstring_tokens: Gets and sets the expires field . If not set will return the default