switch {
	case !f.And.isEmpty():
		if err := e.EncodeElement(f.And, xml.StartElement{Name: xml.Name{Local: "And"}}); err != nil {
			return err
		}
	case !f.Tag.IsEmpty():
		if err := e.EncodeElement(f.Tag, xml.StartElement{Name: xml.Name{Local: "Tag"}}); err != nil {
			return err
		}
	default:
		// Always print Prefix field when both And & Tag are empty

	if o.isDeleteMarker {
		start.Name.Local = "DeleteMarker"
	} else {
		start.Name.Local = "Version"
	}
	type objectVersionWrapper ObjectVersion
	return e.EncodeElement(objectVersionWrapper(o), start)
}

// DeleteMarkerVersion container for delete marker metadata
type DeleteMarkerVersion struct {
	Key          string