* and its as-of time to the callback. This is useful if adaptiveTTL() is used
* on the old value's as-of time when it is verified as still being correct.
* Default: 0.
+ * @note Options added in 1.28: staleTTL
* @return bool Success
*/
final public function set( $key, $value, $ttl = 0, array $opts = [] ) {
* - ageNew: Consider popularity refreshes only once a key reaches this age in seconds.
* Default: WANObjectCache::AGE_NEW.
* @return mixed Value found or written to the key
+ * @note Options added in 1.28: version, busyValue, hotTTR, ageNew, pcGroup, minAsOf
* @note Callable type hints are not used to avoid class-autoloading
*/
final public function getWithSetCallback( $key, $ttl, $callback, array $opts = [] ) {