Method _checkMap

storage.js:66–73

(map)

    };
  }
  _checkMap(map) {
    if(map && map.innerVersion && map.innerVersion === this._innerVersion ) {
      return map;
    }
    else {
      return this._initMap();
    }
  }
  _getId(key, id) {
    return key + '_' + id;
  }