NumVersions      int
	SuccessorModTime time.Time
	TransitionStatus string
	RestoreOngoing   bool
	RestoreExpires   time.Time
}

// ExpiredObjectDeleteMarker returns true if an object version referred to by o
// is the only version remaining and is a delete marker. It returns false
// otherwise.
func (o ObjectOpts) ExpiredObjectDeleteMarker() bool {
	return o.DeleteMarker && o.NumVersions == 1
}