if !ret.RetainUntilDate.IsZero() && ret.RetainUntilDate.Before(t) {
		return &ret, ErrPastObjectLockRetainDate
	}

	return &ret, nil
}

// IsObjectLockRetentionRequested returns true if object lock retention headers are set.
func IsObjectLockRetentionRequested(h http.Header) bool {
	if _, ok := h[AmzObjectLockMode]; ok {
		return true
	}
	if _, ok := h[AmzObjectLockRetainUntilDate]; ok {
		return true
	}