/**
  * Zend Server factory
  * @param string $config
  * @param array $apiVersionConfig
  */
 public static function factory($config)
 {
     $zendServer = new self($config);
     $apiVersion = current(array_keys(self::$apiVersionConfig, $zendServer->getVersion()));
     $zendServer->setApiVersion($apiVersion);
     return $zendServer;
 }