text: import methods from './Methods.js';
  import Extend from './Extend.js';
  
  const Base = Phaser.Data.DataManager;
  const EventEmitterKlass = Phaser.Events.EventEmitter;
  
  class DataManager extends Base {
      constructor(parent, eventEmitter) {
          var useDefaultEventEmitter = (eventEmitter === undefined);
          if (useDefaultEventEmitter) {
              eventEmitter = new EventEmitterKlass();
          }
  
          super(parent, eventEmitter);
  
          if (useDefaultEventEmitter) {
              var parentEventEmitter = (parent.events) ? parent.events : parent;
              if (parentEventEmitter) {
                  parentEventEmitter.once('destroy', this.destroy, this);
              }
          }
  
          Extend(this);
      }
  }
  
  Object.assign(
      DataManager.prototype,
      methods
  );
  
  export default DataManager;