https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.AlloyDb.V1Beta/latest/Google.Cloud.AlloyDb.V1Beta.AutomatedBackupPolicy.RetentionOneofCase
AlloyDB v1beta API - Enum AutomatedBackupPolicy.RetentionOneofCase (1.0.0-beta16) | .NET client...
alloydbapienum