/**
* @param string $key
- * @param Closure $callback Callback method to be executed
+ * @param callable $callback Callback method to be executed
* @param int $exptime Either an interval in seconds or a unix timestamp for expiry
* @param int $attempts The amount of times to attempt a merge in case of failure
* @return bool Success
*/
- public function merge( $key, Closure $callback, $exptime = 0, $attempts = 10 ) {
+ public function merge( $key, $callback, $exptime = 0, $attempts = 10 ) {
return $this->mergeViaLock( $key, $callback, $exptime, $attempts );
}