}
	}
	return raw.Event{
		Version: version.Go122,
		Ev:      ev,
		Args:    args,
		Data:    data,
	}
}

type stack struct {
	stk [32]trace.StackFrame
	len int
}

var (
	NoString = ""
	NoStack  = []trace.StackFrame{}
)

// Generation represents a single generation in the trace.
type Generation struct {
	trace   *Trace
	gen     uint64
	batches []*Batch

// used to store the frames to reduce allocations.
func viewerFrames(stk trace.Stack) []*trace.Frame {
	var frames []*trace.Frame
	stk.Frames(func(f trace.StackFrame) bool {
		frames = append(frames, &trace.Frame{
			PC:   f.PC,
			Fn:   f.Func,
			File: f.File,
			Line: int(f.Line),
		})
		return true
	})
	return frames
}

	}
	return candidates[0]
}

// dumpStack returns e.Stack() as a string.
func dumpStackV2(e *trace.Event) string {
	var buf bytes.Buffer
	e.Stack().Frames(func(f trace.StackFrame) bool {
		file := strings.TrimPrefix(f.File, runtime.GOROOT())
		fmt.Fprintf(&buf, "%s\n\t%s:%d\n", f.Func, file, f.Line)
		return true
	})
	return buf.String()

// at the root of the stack trace is named name.
func filterStackRootFunc(name string) eventFilterFn {
	return func(e *format.Event, data *format.Data) bool {
		frames := stackFrames(data, e.Stack)
		rootFrame := frames[len(frames)-1]
		return strings.HasPrefix(rootFrame, name+":")
	}
}

// filterViewerTrace returns a copy of data with only the events that pass all