Any way to invoke code from VCL after a request has been serviced?

[Ryan Burn]

> How about a VMOD doing the only StartSpan, std.log for logging keys
> and whatnot, and the VUT doing all the rest when it processes the
> transaction's logs?

But the VUT would be running in a separate process, no? If so, how
does it access the span object returned when you start the span. The
OpenTracing API doesn't support augmenting information to a span
later. The functions to set the tags, finish time, etc all have to act
on the same object that's returned when you first start the span.