class GoogleHadoopFileSystemBase extends FileSystem implements FileSystemDescriptor {

  @Override
  public String getCanonicalServiceName() {
    String service = null;
    if (delegationTokens != null) {
      service = delegationTokens.getService().toString();
    }
    logger.atFinest().log("getCanonicalServiceName(): %s", service);
    return service;
  }

  public  GoogleHadoopFileSystemBase();
    GoogleHadoopFileSystemBase(GoogleCloudStorageFileSystem gcsFs);

}