code: public static WasbUnderFileSystem createInstance(AlluxioURI uri,
        UnderFileSystemConfiguration conf, AlluxioConfiguration alluxioConf) {
      Configuration wasbConf = createConfiguration(conf);
      return new WasbUnderFileSystem(uri, conf, wasbConf, alluxioConf);
    }
docs: Factory method to construct a new Wasb {@link UnderFileSystem}.
  
  @param uri the {@link AlluxioURI} for this UFS
  @param conf the configuration for this UFS
  @param alluxioConf Alluxio configuration
  @return a new Wasb {@link UnderFileSystem} instance