http://allegro.pl/webapi/documentation.php/show/id,201

def doSendRefundForms(self, item_id, buyer_id, reason, quantity_sold):
        """http://allegro.pl/webapi/documentation.php/show/id,201"""
        # TODO: deprecated
        return self.__ask__('doSendRefundForms',
                            sendRefundFormsDataArr={
                                'item': {
                                    'itemId': item_id, 'buyerId': buyer_id,
                                    'refundReason': reason, 'itemQuantitySold': quantity_sold
                                }
                            })['sendRefundFormsResultsArr']