Values_0.PropagatingAttributeSourceAn object that represents the connection attribute, thing attribute, and the user property key.
type nonrec t = {userPropertyKey : UserPropertyKeyName.t option;The key of the user property key-value pair.
*)thingAttribute : AttributeName.t option;The user-defined thing attribute that is propagating for MQTT 5 message enrichment.
*)connectionAttribute : ConnectionAttributeName.t option;The attribute associated with the connection between a device and Amazon Web Services IoT Core.
*)}