if (TF_GetCode(status) != TF_OK) return;
  int num_retvals = 0;
  TFE_Execute(op.get(), nullptr, &num_retvals, status);
  if (TF_GetCode(status) != TF_OK) return;
  // Delete the variable handle itself.
  TFE_DeleteTensorHandle(handle_);
}

TensorHandlePtr Variable::Read(TFE_Context* context, TF_Status* status) {
  std::unique_ptr<TFE_Op, decltype(&TFE_DeleteOp)> op(

  }
};

using ExecutorPtr = std::unique_ptr<TFE_Executor, ExecutorDeleter>;

}  // namespace

// Allows a single op at a time to be launched without blocking.
//
// DeviceThread itself is thread-safe, in that StartExecute will block if there
// is a pending execution. Since StartExecute is equivalent to grabbing a lock,
// multiple DeviceThreads should always be accessed in the same order to avoid
// deadlocks.

    return false;
  }
  return true;
}

static std::vector<std::string> GetChildrenBounded(
    GCSFile* gcs_file, std::string dir, uint64_t max_results, bool recursive,
    bool include_self_directory_marker, TF_Status* status) {
  std::string bucket, prefix;
  MaybeAppendSlash(&dir);
  ParseGCSPath(dir, true, &bucket, &prefix, status);

  std::vector<std::string> result;
  uint64_t count = 0;