protected function _convertContentNodeLayout(array $contentNodeRow) {
        $contentTypes = $this->_config['contentTypes'];
        $contentNode = array();
        foreach ($contentTypes as $contentType) {
            $contentType = $this->_extractContentTypeAlias($contentType);
            if ($contentNodeRow[$contentType]) {
                $modelName = explode('_', $contentType);
                $modelName = array_pop($modelName);
                $contentNode['model'] = $modelName;
                $contentNode['type']  = $contentNodeRow['type'];
                $contentNode['data']  = $contentNodeRow[$contentType];
                $contentNode['columns'] = $contentNodeRow['columns'];
                $contentNode['classes'] = $contentNodeRow['classes'];
                break;
            }
        }
        return $contentNode;
    }