protected function prepareChildObject(\Ess\M2ePro\Model\ActiveRecord\Component\Parent\AbstractModel $object)
 {
     $data = $object->getData();
     $object->unsetData();
     $modelName = str_replace('Ess\\M2ePro\\Model', ucwords($this->childMode), $this->_model);
     $childObject = $this->activeRecordFactory->getObject($modelName);
     $childColumnsData = $this->getConnection()->describeTable($this->getResource()->getChildTable());
     foreach ($childColumnsData as $columnData) {
         if (!isset($data[$columnData['COLUMN_NAME']])) {
             continue;
         }
         $childObject->setData($columnData['COLUMN_NAME'], $data[$columnData['COLUMN_NAME']]);
         unset($data[$columnData['COLUMN_NAME']]);
     }
     // setting parent data + data from additionally joined tables
     $object->setData($data);
     $object->setOrigData();
     $childObject->setParentObject($object);
     $childObject->setOrigData();
     $object->setChildObject($childObject);
     return $object;
 }