}

func (dsc *DaemonSetsController) dedupCurHistories(ctx context.Context, ds *apps.DaemonSet, curHistories []*apps.ControllerRevision) (*apps.ControllerRevision, error) {
	if len(curHistories) == 1 {
		return curHistories[0], nil
	}
	var maxRevision int64
	var keepCur *apps.ControllerRevision
	for _, cur := range curHistories {
		if cur.Revision >= maxRevision {
			keepCur = cur
			maxRevision = cur.Revision
		}
	}