How to set IDs in SpanContext

[imrefazekas]

Hello,

I'm using nats messaging and I would love to see the IDs (messageID, correlationID) within the SpanContext in order to be able to see the flow by these IDs.
As I can tell, that APi does not allow me to set these IDs at all.
Is there a way to force SpanContext to receive ids from outside? It is not too convenient to use new ids since I already have ones and those IDs already defines the graph of the calls implicityly.

Thanks!

[yurishkuro]

This is not something we explicitly support (relevant discussion in opentracing/specification#137).