Scalr\Modules\PlatformFactory::getRackspacePlatforms PHP Method

    public static function getRackspacePlatforms()
    {
        return [SERVER_PLATFORMS::RACKSPACENG_US, SERVER_PLATFORMS::RACKSPACENG_UK];
    }

 public function _cloudCredentialsType($from, $to, $action)
 {
     switch ($action) {
         case static::ACT_CONVERT_TO_OBJECT:
             /* @cloudCredentialsType $from Entity\CloudCredentials */
             $to->cloudCredentialsType = static::CLOUD_CREDENTIALS_TYPE_RACKSPACE;
             break;
         case static::ACT_CONVERT_TO_ENTITY:
             /* @var $to Entity\CloudCredentials */
             if (!isset($from->isUk)) {
                 $to->cloud = SERVER_PLATFORMS::RACKSPACENG_US;
                 $from->keystoneUrl = static::RACKSPACE_KEYSTONE_URL_US;
                 $this->_keystoneUrl($from, $to, static::ACT_CONVERT_TO_ENTITY);
             }
             break;
         case static::ACT_GET_FILTER_CRITERIA:
             return [['cloud' => ['$in' => PlatformFactory::getRackspacePlatforms()]]];
     }
 }