node_modules/prop-types/factory.js

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';

// React 15.5 references this module, and assumes PropTypes are still callable in production.
// Therefore we re-export development-only version with all the PropTypes checks here.
// However if one is migrating to the `prop-types` npm library, they will go through the
// `index.js` entry point, and it will branch depending on the environment.
var factory = require('./factoryWithTypeCheckers');
module.exports = function(isValidElement) {
  // It is still allowed in 15.5.
  var throwOnDirectAccess = false;
  return factory(isValidElement, throwOnDirectAccess);
};