docs: private static void performWork(Span parent) {
      SpanBuilder spanBuilder =
          tracer
              .spanBuilderWithExplicitParent("internal_work", parent)
              .setRecordEvents(true)
              .setSampler(Samplers.alwaysSample());
      try (Scope scope = spanBuilder.startScopedSpan()) {
        Span span = tracer.getCurrentSpan();
        span.putAttribute("my_attribute", AttributeValue.stringAttributeValue("blue"));
        span.addAnnotation("Performing work.");
        sleepFor(20); // Working hard here.
        span.addAnnotation("Done work.");
      }
    }