amended

This entry with amendment applied at the next revision, or null when the amendment names a revision read that the entry is no longer at: the reference semantics of FailureLedger.amend, for a backend that changes the entry in memory. Every amendment but a ParkedAmendment.Schedule and a ParkedAmendment.TakeRequest clears ParkedAggregate.nextAttemptAt, so the owner looks at the entry again on its next scan.