text: /**
   * Copyright (c) 2015-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.
   *
   * 
   * @format
   */
  
  'use strict';
  
  function createModuleIdFactory() {
    const fileToIdMap = new Map();
    let nextId = 0;
    return path => {
      let id = fileToIdMap.get(path);
      if (typeof id !== 'number') {
        id = nextId++;
        fileToIdMap.set(path, id);
      }
      return id;
    };
  }
  
  module.exports = createModuleIdFactory;