code: /**
   * Copyright (c) Facebook, Inc. and its affiliates.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * @flow
   */
  
  throw new Error(
    'React FS cannot be used outside a react-server environment. ' +
      'You must configure Node.js using the `--conditions react-server` flag.',
  );
  