/**
* @param $key
+ * @param mixed $default
*
* @return mixed
*/
- public function get($key) {
+ public function get($key, $default = NULL) {
+ if ($default !== NULL) {
+ throw new \RuntimeException("FIXME: " . __CLASS__ . "::get() only supports NULL default");
+ }
return apc_fetch($this->_prefix . $key);
}