// Boolean signifies a boolean XML struct with custom marshaling
type Boolean struct {
	val    bool
	set    bool
	Unused struct{} // Needed for GOB compatibility
}

// Expiration - expiration actions for a rule in lifecycle configuration.
type Expiration struct {
	XMLName      xml.Name           `xml:"Expiration"`
	Days         ExpirationDays     `xml:"Days,omitempty"`
	Date         ExpirationDate     `xml:"Date,omitempty"`