code: def update_offer_item(self, offer_item_id, offer_item_dict):
          
          return self._create_put_request(resource=OFFER_ITEMS, billomat_id=offer_item_id, send_data=offer_item_dict)
docs: Updates an offer item
  
          :param offer_item_id: offer item id
          :param offer_item_dict: dict
          :return: dict