- /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('OBJECT-REGISTRY: self::registryInstance[%s][]=%s', $key, gettype(self::$registryInstances[$key])));
- if (is_null(self::$registryInstances[$key])) {
+ /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('OBJECT-REGISTRY: self::registryInstance[%s]?=%d', $key, intval(isset((self::$registryInstances[$key])))));
+ if (!isset(self::$registryInstances[$key])) {