-An FS::part_bill_event object represents an invoice event definition -
-a callback which is triggered when an invoice is a certain amount of time
-overdue. FS::part_bill_event inherits from
-FS::Record. The following fields are currently supported:
+An FS::part_bill_event object represents a deprecated, old-style invoice event
+definition - a callback which is triggered when an invoice is a certain amount
+of time overdue. FS::part_bill_event inherits from FS::Record. The following
+fields are currently supported: