///     if it exists but is not a directory.
  ///   * Might use any other error value for `status` to signal other errors.
  ///
  /// NOTE: The requirements specify that `TF_ALREADY_EXISTS` is not returned if
  /// directory exists. Similarly, `TF_NOT_FOUND` is not be returned, as the
  /// missing directory entry and all its descendants will be created by the
  /// plugin.
  ///