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

	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)

        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
        }
    }

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

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

        def op = operations.first(ResolveTaskMutationsBuildOperationType) {
            it.details.taskPath == taskPath
        }
        op.details.buildPath == ":"
        op.details.taskId != null
    }

	"gstatus", // G status
	"g",       // trace.GoID
	"m",       // trace.ThreadID
	"p",       // trace.ProcID
	"string",  // string ID
	"stack",   // stack ID
	"value",   // uint64
	"task",    // trace.TaskID
}

// Names is a helper that produces a mapping of event names to event types.
func Names(specs []Spec) map[string]Type {
	nameToType := make(map[string]Type)
	for i, spec := range specs {

		return &Reader{
			r: br,
			order: ordering{
				mStates:     make(map[ThreadID]*mState),
				pStates:     make(map[ProcID]*pState),
				gStates:     make(map[GoID]*gState),
				activeTasks: make(map[TaskID]taskState),
			},
			// Don't emit a sync event when we first go to emit events.
			emittedSync: true,
		}, nil
	default:
		return nil, fmt.Errorf("unknown or unsupported version go 1.%d", v)
	}
}

	case "m":
		u = uint64(arg.(trace.ThreadID))
	case "p":
		u = uint64(arg.(trace.ProcID))
	case "string":
		u = b.gen.String(arg.(string))
	case "task":
		u = uint64(arg.(trace.TaskID))
	default:
		panic(fmt.Sprintf("unsupported arg type %q for spec %q", typStr, argSpec))
	}
	return u
}

// RawEvent emits an event into a batch. name must correspond to one