Method _initMap

storage.js:59–65

()

      Promise.resolve();
  }
  _initMap() {
    return {
      innerVersion: this._innerVersion,
      index: 0,
      __keys__: {}
    };
  }
  _checkMap(map) {
    if(map && map.innerVersion && map.innerVersion === this._innerVersion ) {
      return map;