public static function tearDownAfterClass()
 {
     if (self::$internalClient) {
         /** @var Client $client */
         $client = self::$internalClient;
         if (self::$db_isolation) {
             $client->rollbackTransaction();
             self::$db_isolation = false;
         }
         $client->setSoapClient(null);
         self::$internalClient = null;
     }
 }