// afterOrZero checks if time t1 is after time t2; if one of them
// is zero, the zero time is seen as after non-zero time.
func afterOrZero(t1, t2 unversioned.Time) bool {
if t1.Time.IsZero() || t2.Time.IsZero() {
return t1.Time.IsZero()
}
return t1.After(t2.Time)
}
