docs: def numbers(self):
          """"
          Returns the barcode's number without the verification digit.
  
          :return: list(int)
          """
          numstring = '{:011d}{:02d}{:04d}{}{}'.format(
              self._receipt.point_of_sales.owner.cuit,  # 11 digits
              int(self._receipt.receipt_type.code),  # 2 digits
              self._receipt.point_of_sales.number,  # point of sales
              self._receipt.validation.cae,  # 14 digits
              self._receipt.validation.cae_expiration.strftime('%Y%m%d'),  # 8
          )
          return [int(num) for num in numstring]