code: func GetLightStepReporterID(tracer opentracing.Tracer) (uint64, error) {
  	switch lsTracer := tracer.(type) {
  	case *tracerImpl:
  		return lsTracer.reporterID, nil
  	case *tracerv0_14:
  		return GetLightStepReporterID(lsTracer.Tracer)
  	default:
  		return 0, newEventUnsupportedTracer(tracer)
  	}
  }
docs: // GetLightStepReporterID returns the currently configured Reporter ID.