// you can use the value of the last Key in the response as the marker in the
	// subsequent request to get the next set of object keys.
	NextKeyMarker string `xml:"NextKeyMarker,omitempty"`

	// When the number of responses exceeds the value of MaxKeys,
	// NextVersionIdMarker specifies the first object version not
	// returned that satisfies the search criteria. Use this value
	// for the version-id-marker request parameter in a subsequent request.