scopes.Framework.Debugf("cannot parse or cannot find spans in trace object %+v", t)
			continue
		}
		var spans []Span
		for _, obj := range spanObjs {
			newSpan := buildSpan(obj)
			spans = append(spans, newSpan)
		}
		for p := range spans {
			for c := range spans {
				if spans[c].ParentSpanID == spans[p].SpanID {
					spans[p].ChildSpans = append(spans[p].ChildSpans, &spans[c])
				}
			}

// TODO(bianpengyuan) consider using zipkin proto api https://github.com/istio/istio/issues/13926
type Span struct {
	SpanID       string
	ParentSpanID string
	ServiceName  string
	Name         string
	ChildSpans   []*Span
}

// Trace represents a trace by a collection of spans which all belong to that trace
type Trace struct {
	Spans []Span
}

// New returns a new instance of zipkin.

    public void setText(String text) {
        this.spans = Collections.singletonList(new StyledTextOutputEvent.Span(text));
    }

    @Override
    public void setText(StyledTextOutputEvent.Span span) {
        this.spans = Collections.singletonList(span);
    }

    @Override
    public void setText(List<StyledTextOutputEvent.Span> spans) {
        this.spans = spans;
    }

    public Cursor getWritePosition() {

    }

    @Override
    void setText(StyledTextOutputEvent.Span span) {
        throw new UnsupportedOperationException()
    }

    @Override
    void setText(List<StyledTextOutputEvent.Span> spans) {
        String text = ""
        for (StyledTextOutputEvent.Span span : spans) {
            stringToStyleMap.put(span.text, span.style)
            text += span.text
        }
        setText(text)
    }

            new ListSerializer<StyledTextOutputEvent.Span>(
                new SpanSerializer(serializerFactory.getSerializerFor(StyledTextOutput.Style.class))))
    }

    def "can serialize StyledTextOutputEvent messages"() {
        given:
        List spans = [new StyledTextOutputEvent.Span(StyledTextOutput.Style.Description, "description"),
                      new StyledTextOutputEvent.Span(StyledTextOutput.Style.Error, "error")]

# A note on distributed tracing:
#
# Although Istio proxies are able to automatically send spans, they need some
# hints to tie together the entire trace. Applications need to propagate the
# appropriate HTTP headers so that when the proxies send span information, the
# spans can be correlated correctly into a single trace.
#
# To do this, an application needs to collect and propagate headers from the

        OperationIdentifier buildOperationId = decoder.readBoolean() ? new OperationIdentifier(decoder.readSmallLong()) : null;
        List<StyledTextOutputEvent.Span> spans = spanSerializer.read(decoder);
        return new StyledTextOutputEvent(timestamp, category, logLevel, buildOperationId, spans);
    }

import java.util.List;

/**
 * A label where its text can be styled.
 */
public interface StyledLabel extends Label {
    void setText(List<StyledTextOutputEvent.Span> spans);
    void setText(StyledTextOutputEvent.Span span);

        }

        private StyledTextOutputEvent styledTextEvent(long timestamp, StyledTextOutputEvent.Span... spans) {
            return new StyledTextOutputEvent(timestamp, category, LogLevel.LIFECYCLE, buildOperationIdentifier, Arrays.asList(spans));
        }

        private void doOutput(RenderableOutputEvent event) {

		throw("traceSnapshotMemory: tracing is not enabled")
	}

	// Write out all the heap spans and heap objects.
	for _, s := range mheap_.allspans {
		if s.state.get() == mSpanDead {
			continue
		}
		// It's some kind of span, so trace that it exists.
		trace.SpanExists(s)

		// Write out allocated objects if it's a heap span.
		if s.state.get() != mSpanInUse {
			continue
		}

		// Find all allocated objects.