if index:

            yield ""

        yield f"{entity_s} {invoice_s}:"

        yield f"  {balance_s} outstanding since {date_s}"

class OutgoingReport(BaseReport):

    class PaymentMethods(enum.Enum):

        ach = 'ACH'

        check = 'Check'

        creditcard = 'Credit Card'

        debitcard = 'Debit Card'

        paypal = 'PayPal'

        vendorportal = 'Vendor Portal'

        wire = 'Wire'

        fxwire = wire

        uswire = wire

    def __init__(self, rt_wrapper: rtutil.RT, out_file: TextIO) -> None:

        super().__init__(out_file)

        self.rt_wrapper = rt_wrapper

        self.rt_client = rt_wrapper.rt