public function getRowsByParentRow(Kwf_Model_Row_Interface $parentRow, $select = array())
 {
     if (!is_object($select)) {
         $select = $this->select($select);
     }
     if ($select->getParts()) {
         throw new Kwf_Exception_NotYetImplemented('Custom select is not yet implemented');
     }
     if (!$parentRow instanceof Kwf_Util_Model_Amazon_Products_Row) {
         throw new Kwf_Exception('Only possible with amazon product row');
     }
     $pId = $parentRow->getInternalId();
     $item = $parentRow->getItem();
     $this->_data[$pId] = array();
     foreach ($item->BrowseNodes as $n) {
         $this->_data[$pId][] = array('node_id' => $n);
     }
     return new $this->_rowsetClass(array('model' => $this, 'dataKeys' => array_keys($this->_data[$pId]), 'parentRow' => $parentRow));
 }