/// `TF_OK`, free memory allocated for `token` and return -1.
  ///
  /// The allocation and freeing of memory must happen via the functions sent to
  /// core TensorFlow upon registration (see the `TF_FilesystemPluginInfo`
  /// structure in Section 4).
  ///
  /// Plugins:
  ///   * Must set `status` to `TF_OK` if transaction successfuly finalized.