Values_1.DownloadUrlMetadataSourceMetadata used to download the attached file.
type nonrec t = {url : MetadataUrl.t option;A pre-signed URL that should be used to download the attached file.
*)urlExpiry : Values_0.ISO8601Datetime.t option;The expiration time of the URL in ISO timestamp. It's specified in ISO 8601 format: yyyy-MM-ddThh:mm:ss.SSSZ. For example, 2019-11-08T02:41:28.172Z.
*)}