*/
public function merge( $key, Closure $callback, $exptime = 0, $attempts = 10 ) {
return $this->mergeViaLock( $key, $callback, $exptime, $attempts );
*/
public function merge( $key, Closure $callback, $exptime = 0, $attempts = 10 ) {
return $this->mergeViaLock( $key, $callback, $exptime, $attempts );