/** * resetSingleInstance() * * @param string $namespaceName * @return null */ public static function resetSingleInstance($namespaceName = null) { if ($namespaceName != null) { if (array_key_exists($namespaceName, self::$_singleInstances)) { unset(self::$_singleInstances[$namespaceName]); } return; } self::$_singleInstances = array(); return; }