生成完成后，我们就可以直接使用这些实体类进行数据序列化和反序列化操作：
Now, OsmAnd performs another Dijkstra search, but this time on the much smaller "base graph." This graph consists only of the border points and the pre-calculated shortcut values between them.
，这一点在服务器推荐中也有详细论述
Activists working on internet freedom in countries that unjustly criminalize that work
for storage in self.storages: