getHotCityList method
返回热门城市列表
Implementation
Future<List<BMFOfflineCityRecord>> getHotCityList() async {
  return await _bmfOfflineMapDispatcher.getHotCityListDispatch(_channel);
}
    返回热门城市列表
Future<List<BMFOfflineCityRecord>> getHotCityList() async {
  return await _bmfOfflineMapDispatcher.getHotCityListDispatch(_channel);
}