Values_1.EmailMessageReferenceSourceInformation about the reference when the referenceType is EMAIL_MESSAGE. Otherwise, null.
type nonrec t = {name : Values_0.ReferenceKey.t option;The name of the email message reference
*)arn : Values_0.ReferenceArn.t option;The Amazon Resource Name (ARN) of the email message reference
*)}val to_value :
t ->
[> `Structure of (string * [> `String of Values_0.ReferenceKey.t ]) list ]