MessageEvents are not propagated?

[prestonvanloon]

Please answer these questions before submitting a bug report.

What version of the Exporter are you using?

commit 5b8293c

What version of OpenCensus are you using?

commit 7bbec1755a8162b5923fc214a494773a701d506a

What version of Go are you using?

go 1.13

What did you do?

If possible, provide a recipe for reproducing the error.

// On sending side
span.AddMessageSendEvent(id, n, n)
// On receiving side
span.AddMessageReceiveEvent(id, n, n)

What did you expect to see?

Messages linked in jaeger

What did you see instead?

Nothing.

Additional context

See how stackdriver exports these events: https://github.com/census-ecosystem/opencensus-go-exporter-stackdriver/blob/4351271b777d160d27010a22de3e41fd07335556/trace_proto.go#L121