Values_0.CallbackStepMetadataSourceMetadata about a callback step.
type nonrec t = {callbackToken : CallbackToken.t option;The pipeline generated token from the Amazon SQS queue.
*)sqsQueueUrl : String256.t option;The URL of the Amazon Simple Queue Service (Amazon SQS) queue used by the callback step.
*)outputParameters : OutputParameterList.t option;A list of the output parameters of the callback step.
*)}val to_value :
t ->
[> `Structure of
(string
* [> `List of
[> `Structure of (string * [> `String of String256.t ]) list ]
list
| `String of CallbackToken.t ])
list ]