public function swap($IPAddressID, $withIPAddressID = null, $toLinodeID = null)
    {
        return $this->call('linode.ip.swap', [
            'IPAddressID'     => $IPAddressID,
            'withIPAddressID' => $withIPAddressID,
            'toLinodeID'      => $toLinodeID,
        ]);
    }