trace property

The REST resource name of the trace being written to Cloud Trace (https://cloud.google.com/trace) in association with this log entry.

For example, if your trace data is stored in the Cloud project "my-trace-project" and if the service that is creating the log entry receives a trace header that includes the trace ID "12345", then the service should use "projects/my-trace-project/traces/12345".The trace field provides the link between logs and traces. By using this field, you can navigate from a log entry to a trace.

Optional.