def get_last_row_item_id(self, spreadsheet_tree):
        items = list(spreadsheet_tree.iter("tr"))
        return items[-1].attrib["id"] if items else None
Returns the last row in the given spreadsheet `ElementTree`.
dataset/ETHPy150Open quip/quip-api/python/quip.py/QuipClient.get_last_row_item_id