No way to add a Link to an already-created Span

[Sushisource]

As far as I can tell the only (typescript safe) way to link spans is to pass the link when creating the span as here: https://open-telemetry.github.io/opentelemetry-js-api/interfaces/tracer.html#startspan

However, it's desirable in many situations to be able to associate spans after they are created. I couldn't find any way to do this.

I would expect to be able to do something like:

span.link(otherSpanContext)

If there's a way to do this already please let me know. I could contribute this if it makes sense

[srikanthccv]

@Sushisource See this open-telemetry/opentelemetry-specification#454 and this open-telemetry/opentelemetry-specification#826

[Sushisource]

@lonewolf3739 Wow, thanks. This seems like such a clear thing to want to do that I just assumed it was part of the spec. What's funny is this actually already works if you bypass TS and just manually insert the links into the span, but I can see how sampling etc complicates things.

Feel free to close this in lieu of the issues on the spec if desired