code: def iter_series(self, workbook, row, col):
          
          for series in self.__series:
              series = dict(series)
              series["values"] = series["values"].get_formula(workbook, row, col)
              if "categories" in series:
                  series["categories"] = series["categories"].get_formula(workbook, row, col)
              yield series
docs: Yield series dictionaries with values resolved to the final excel formulas.