/** * Returns true if the response is worth caching under any circumstance. * * Responses marked "private" with an explicit Cache-Control directive are * considered uncacheable. * * Responses with neither a freshness lifetime (Expires, max-age) nor cache * validator (Last-Modified, ETag) are considered uncacheable. * * @return bool true if the response is worth caching, false otherwise * * @api */ public function isCacheable() { return parent::isCacheable(); }