Values_0.RegistrationMetadataItemSourceReserved for internal use.
type nonrec t = {key : RegistrationMetadataKey.t;Reserved for internal use.
*)value : RegistrationMetadataValue.t;Reserved for internal use.
*)}val to_value :
t ->
[> `Structure of (string * [> `String of RegistrationMetadataKey.t ]) list ]