in pkg/plugin/cloudtrace/cloudtrace.go [47:57]
func GetServiceName(span *tracepb.TraceSpan) string {
labels := span.GetLabels()
// In both cases treating "not existing" and "empty value" the same
serviceName := labels[otelServiceKey]
if serviceName == "" {
serviceName = labels[gaeServiceKey]
}
return serviceName
}