/**
  * If you want to allow a page to be cached by shared proxies for one minute.
  *
  * @param int $seconds Interval in seconds
  *
  * @return $this
  */
 public function cacheNoValidate($seconds = 60)
 {
     self::preventMultipleCaching();
     self::$cached = true;
     Header::cacheNoValidate($seconds);
     return $this;
 }