public function create($options = array()) {
        $options = new Values($options);

        $data = Values::of(array(
            'UniqueName' => $options['uniqueName'],
            'FriendlyName' => $options['friendlyName'],
            'DataEnabled' => Serialize::booleanToString($options['dataEnabled']),
            'DataLimit' => $options['dataLimit'],
            'DataMetering' => $options['dataMetering'],
            'MessagingEnabled' => Serialize::booleanToString($options['messagingEnabled']),
            'VoiceEnabled' => Serialize::booleanToString($options['voiceEnabled']),
            'CommandsEnabled' => Serialize::booleanToString($options['commandsEnabled']),
            'NationalRoamingEnabled' => Serialize::booleanToString($options['nationalRoamingEnabled']),
            'InternationalRoaming' => Serialize::map($options['internationalRoaming'], function($e) { return $e; }),
        ));

        $payload = $this->version->create(
            'POST',
            $this->uri,
            array(),
            $data
        );

        return new RatePlanInstance($this->version, $payload);
    }