class AppEngineTraceService extends TraceService {

  @Override
  public Span open(String name) {
    checkNotNull(name);

    return new SpanImpl(traceService.startSpan(name));
  }

  public  AppEngineTraceService();
  @VisibleForTesting  AppEngineTraceService(com.google.appengine.api.labs.trace.TraceService traceService);

}