-- upstream: https://github.com/facebook/react/blob/b61174fb7b09580c1ec2a8f55e73204b706d2935/packages/shared/ReactSymbols.js
--!strict
--[[*
 * 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
 ]]