1  /**
 2   * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 3   *
 4   * This source code is licensed under the MIT license found in the
 5   * LICENSE file in the root directory of this source tree.
 6   */
 7  export default function isError(potentialError: any): {
 8      isError: boolean;
 9      message: string | null;
10  };