An enriched Variant trace event that is passed to a trace event flusher.
Instantiated by Variant server and passed to the implementation of the trace event flusher
The Variant session ID, which triggered this trace event.
The entire session object is not available
because of the potential latency between the time a trace event is triggered
and the time when user code gets access to this object, the triggering session
may have completely changed or even expired.