public static function doAppEngineCheck()
 {
     if (Environment::onDevAppServer()) {
         // turn on error reporting and debugging
         Debug::enable(E_ERROR | E_PARSE);
         // fix Dev AppServer XML-loading bug
         Environment::fixXmlFileLoaderBug();
     }
     if (self::onAppEngine() || self::onDevAppServer()) {
         self::checkBucketName();
     }
 }