opts.endTime = g.EndTime.Sub(parsed.startTime())
			} else { // The goroutine didn't end.
				opts.endTime = parsed.endTime().Sub(parsed.startTime())
			}
			opts.focusGoroutine = goid
			opts.goroutines = trace.RelatedGoroutinesV2(parsed.events, goid)
		} else if taskids := r.FormValue("focustask"); taskids != "" {
			taskid, err := strconv.ParseUint(taskids, 10, 64)
			if err != nil {