NewerNoncurrentVersions int            `xml:"NewerNoncurrentVersions,omitempty"`
	set                     bool
}

// MarshalXML if non-current days not set to non zero value
func (n NoncurrentVersionExpiration) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if n.IsNull() {
		return nil
	}
	type noncurrentVersionExpirationWrapper NoncurrentVersionExpiration

	var s string
	if err = d.DecodeElement(&s, &start); err != nil {
		return err
	}
	*p = Prefix{string: s, set: true}
	return nil
}

// MarshalXML - decodes XML data.
func (p Prefix) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
	if !p.set {
		return nil
	}
	return e.EncodeElement(p.string, startElement)
}

// String returns the prefix string

		return err
	}
	if numDays <= 0 {
		return errLifecycleInvalidDays
	}
	*eDays = ExpirationDays(numDays)
	return nil
}

// MarshalXML encodes number of days to expire if it is non-zero and
// encodes empty string otherwise
func (eDays ExpirationDays) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
	if eDays == 0 {
		return nil
	}
	return e.EncodeElement(int(eDays), startElement)
}

		return errTransitionDateNotMidnight
	}

	*tDate = TransitionDate{trnDate}
	return nil
}

// MarshalXML encodes expiration date if it is non-zero and encodes
// empty string otherwise
func (tDate TransitionDate) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
	if tDate.Time.IsZero() {
		return nil
	}
	return e.EncodeElement(tDate.Format(time.RFC3339), startElement)

		return err
	}

	if dexp.Days <= 0 {
		return errInvalidDaysDelMarkerExpiration
	}

	*de = DelMarkerExpiration(dexp)
	return nil
}

// MarshalXML encodes a DelMarkerExpiration value into an XML element
func (de DelMarkerExpiration) MarshalXML(enc *xml.Encoder, start xml.StartElement) error {
	if de.Empty() {
		return nil
	}

	type delMarkerExpiration DelMarkerExpiration

}

// DeleteMarkerMTime is an embedded type containing time.Time for XML marshal
type DeleteMarkerMTime struct {
	time.Time
}

// MarshalXML encodes expiration date if it is non-zero and encodes
// empty string otherwise
func (t DeleteMarkerMTime) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
	if t.Time.IsZero() {
		return nil
	}
	return e.EncodeElement(t.Time.Format(time.RFC3339), startElement)

// used for multi-destination targets
func (d Destination) TargetArn() bool {
	return strings.HasPrefix(d.ARN, DestinationARNMinIOPrefix)
}

// MarshalXML - encodes to XML data.
func (d Destination) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if err := e.EncodeToken(start); err != nil {
		return err
	}

// IsEmpty returns true if filter is not set
func (f Filter) IsEmpty() bool {
	return f.And.isEmpty() && f.Tag.IsEmpty() && f.Prefix == ""
}

// MarshalXML - produces the xml representation of the Filter struct
// only one of Prefix, And and Tag should be present in the output.
func (f Filter) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if err := e.EncodeToken(start); err != nil {
		return err
	}

	switch {

	case string(AES256):
		*alg = AES256
	case string(AWSKms):
		*alg = AWSKms
	default:
		return errors.New("Unknown SSE algorithm")
	}

	return nil
}

// MarshalXML - Marshals given SSE algorithm to valid XML
func (alg *Algorithm) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	return e.EncodeElement(string(*alg), start)
}

// EncryptionAction - for ApplyServerSideEncryptionByDefault XML tag

	And    And
	andSet bool

	Tag    Tag
	tagSet bool

	// Caching tags, only once
	cachedTags map[string]string
}

// MarshalXML - produces the xml representation of the Filter struct
// only one of Prefix, And and Tag should be present in the output.
func (f Filter) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if !f.set {
		return nil
	}

	if err := e.EncodeToken(start); err != nil {
		return err