RetentionExemption# class nominal.core.RetentionExemption(dataset_rid, source_id, start, end, description)# Bases: object A time range of a dataset’s data that retention must not delete. dataset_rid: str# RID of the dataset the exemption applies to. source_id: str# Identifies what owns the exemption. Locking a run creates exemptions whose source ID is the run’s RID. start: int# Start of the exempt range, in UTC nanoseconds. end: int# End of the exempt range, in UTC nanoseconds. description: str | None# Why the range is exempt, if one was given.