public function getRole($roleName, $organization = null)
    {
        $url = self::makeUrl($organization, $roleName);
        $resp = $this->service->prepAndSend($url, array(200), 'GET', null, true, 'application/json', 'application/json');	
		$data = json_decode($resp);
        return @new Role($data->name, $data->tenantId, $data->externallyDefined);
    }