protected function _addNestedFieldsToExportModel(\MUtil_Model_ModelAbstract $model, array $data, array &$prefixes)
    {
        // Set labels in the main model for the submodel fields
        if ($model->getMeta('nested', false)) {
            $nestedNames = $model->getMeta('nestedNames');
            foreach($nestedNames as $nestedName) {
                $nestedModel = $model->get($nestedName, 'model');
                $nestedLabels = $nestedModel->getcolNames('label');
                foreach($nestedLabels as $colName) {
                    $label = $nestedModel->get($colName, 'label');
                    $model->set($colName, 'label', $label);
                }
                $model->remove($nestedName, 'label');
            }
        }
    }