def SerializeToString(self, value):
No invoice gets created if the subscription didn't start in the previous month.
dataset/ETHPy150Open google/grr/grr/lib/rdfvalues/structs.py/AbstractSerlializer.SerializeToString--crossover with--dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/accounting/tests/test_invoicing.py/TestInvoice.test_no_invoice_before_start