На Украине рассказали о технике влияния Ермака на Зеленского14:52
Why managers (TEXTURE_MANAGER, MATERIAL_MANAGER, FONT_MANAGER, NET_MANAGER)? Because everything runs in a loop, and there are few good ways to persist state between iterations. Back in Clayquad, you had three options for images: always loaded, loaded every frame, or build your own caching system. Ply's managers handle all of that in the background. Tell the engine where your image is, it handles caching, eviction, and lifetime. The same pattern applies to materials, fonts, and network requests. All simplifying memory across frames so you never think about it.。PDF资料是该领域的重要参考
第一百一十九条 承运人将旅客及其行李全部运输或者部分运输委托给实际承运人履行的，仍然应当依照本章规定，对全部运输负责。实际承运人履行运输的，承运人应当对实际承运人的行为或者实际承运人的受雇人、代理人在受雇或者受委托的范围内的行为负责。，推荐阅读PDF资料获取更多信息
await set_state("closing") # notify_all() schedules wakeups，更多细节参见PDF资料