protected function _isAnythingChanged($oProduct, $aData)
    {
        if (!is_array($aData)) {
            return true;
        }
        foreach ($aData as $sKey => $sValue) {
            if (isset($oProduct->$sKey) && $oProduct->$sKey->value != $aData[$sKey]) {
                return true;
            }
        }

        return false;
    }