taskid, err := strconv.ParseUint(taskids, 10, 64)
			if err != nil {
				log.Printf("failed to parse taskid parameter %q: %v", taskids, err)
				return
			}
			task, ok := parsed.summary.Tasks[trace.TaskID(taskid)]
			if !ok {
				log.Printf("failed to find task with id %d", taskid)
				return
			}
			// This mode is goroutine-oriented.
			opts.mode = traceviewer.ModeGoroutineOriented

	type task struct {
		name       string
		parent     *trace.TaskID
		children   []trace.TaskID
		logs       []trace.Log
		goroutines []trace.GoID
	}
	parent := func(id trace.TaskID) *trace.TaskID {
		p := new(trace.TaskID)
		*p = id
		return p
	}
	wantTasks := map[trace.TaskID]task{
		trace.BackgroundTask: {
			// The background task (0) is never any task's parent.

	b1 := g1.Batch(trace.ThreadID(0), 0)
	b1.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
	b1.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b1.Event("UserTaskBegin", trace.TaskID(2), trace.TaskID(0) /* 0 means no parent, not background */, "my task", testgen.NoStack)

	g2 := t.Generation(2)

	// That same goroutine emits a task end in the following generation.
	b2 := g2.Batch(trace.ThreadID(0), 5)

			kind trace.EventKind
			task trace.TaskID
			args []string
		}
		want := []evDesc{
			{trace.EventTaskBegin, trace.TaskID(1), []string{"task0"}},
			{trace.EventRegionBegin, trace.TaskID(1), []string{"region0"}},
			{trace.EventRegionBegin, trace.TaskID(1), []string{"region1"}},
			{trace.EventLog, trace.TaskID(1), []string{"key0", "0123456789abcdef"}},
			{trace.EventRegionEnd, trace.TaskID(1), []string{"region1"}},

        def uniqueId = Iterables.getOnlyElement(realizeOps*.details*.taskId as Set)

        when:
        configurationCacheRun(":foo")
        then:
        def realizeOp = buildOperations.only(RealizeTaskBuildOperationType)
        with(realizeOp.details) {
            taskPath == ":foo"
            taskId == uniqueId
            eager == true
        }
    }

		endStack = region.End.Stack()
		endTime = region.End.Time()
		goroutine = region.End.Goroutine()
	}
	if goroutine == trace.NoGoroutine {
		return
	}
	arg := struct {
		TaskID uint64 `json:"taskid"`
	}{
		TaskID: uint64(region.TaskID),
	}
	ctx.AsyncSlice(traceviewer.AsyncSliceEvent{
		SliceEvent: traceviewer.SliceEvent{
			Name:     region.Name,
			Ts:       ctx.elapsed(startTime),

        def allRegisterIds = allRegisterOps*.details*.taskId
        allRegisterIds == allRegisterIds as Set

        // all realize ops have unique task id
        def allRealizeOps = buildOperations.all(RealizeTaskBuildOperationType)
        def allRealizeIds = allRealizeOps*.details*.taskId
        allRealizeIds == allRealizeIds as Set

            storeOrigin(buildOperation, details.getTaskId());
        }
    }

    private void storeOrigin(BuildOperationDescriptor buildOperation, long taskId) {
        origins.computeIfAbsent(taskId, key -> {
            PluginApplication pluginApplication = pluginApplicationTracker.findRunningPluginApplication(buildOperation.getParentId());

{{end}}
</tr>
{{range .Regions}}
	<tr>
		<td> <a href="/trace?goid={{.Goroutine}}">{{.Goroutine}}</a> </td>
		<td> {{if .TaskID}}<a href="/trace?focustask={{.TaskID}}">{{.TaskID}}</a>{{end}} </td>
		<td> {{ .TotalTime.String }} </td>
		<td>
			<div class="stacked-bar-graph">
			{{$Region := .}}
			{{range $.NonOverlappingStats}}

	}
	return descendents
}

// UserRegionSummary represents a region and goroutine execution stats
// while the region was active. (For v2 traces.)
type UserRegionSummary struct {
	TaskID TaskID
	Name   string

	// Region start event. Normally EventRegionBegin event or nil,
	// but can be a state transition event from NotExist or Undetermined
	// if the region is a synthetic region representing task inheritance