return ev, nil
}

var errSkip = errors.New("skip event")

// convertEvent converts an event from the old trace format to zero or more
// events in the new format. Most events translate 1 to 1. Some events don't
// result in an event right away, in which case convertEvent returns errSkip.
// Some events result in more than one new event; in this case, convertEvent
// returns the first event and stores additional events in it.extra. When