auto gcs_file = static_cast<GCSFile*>(file->plugin_file);
  TF_VLog(3, "Sync: gs://%s/%s", gcs_file->bucket.c_str(),
          gcs_file->object.c_str());
  Flush(file, status);
}

void Close(const TF_WritableFile* file, TF_Status* status) {
  auto gcs_file = static_cast<GCSFile*>(file->plugin_file);
  TF_VLog(3, "Close: gs://%s/%s", gcs_file->bucket.c_str(),
          gcs_file->object.c_str());

      TF_ThreadOptions thread_options;
      TF_DefaultThreadOptions(&thread_options);
      pruning_thread_.reset(
          TF_StartThread(&thread_options, "TF_prune_FBC", PruneThread, this));
    }
    TF_VLog(1, "GCS file block cache is %s.\n",
            (IsCacheEnabled() ? "enabled" : "disabled"));
  }

  ~RamFileBlockCache() {
    if (pruning_thread_) {
      stop_pruning_thread_.Notify();