public function __isset($key)
    {
        $result = parent::__isset($key);
        if ($result) {
            return $result;
        }
        //        if (! $result && $key == 'identifier') {
        //            $resourceModel = $this->getResourceModel();
        //            if ($resourceModel && $resourceModel instanceof AdminModel) {
        //                return ! is_null($resourceModel->getIdentifier());
        //            }
        //        }

        // If we don't have a value try to find it in metadata
        if (! $result && $key != 'meta') {
            return isset($this->meta[$key]);
        }
    }