When InitField or (more likely) a subtype of it is instantiated
Or to create a base class (a la Pydantic) that does.
，这一点在Line官方版本下载中也有详细论述
新疆维吾尔自治区阿克苏地区库车市，热斯坦历史文化街区的龟兹非遗工坊内，琴声叮咚。七八名参加研学活动的学生围坐在民族乐器店的长凳上，指尖轻拨琴弦。店主买买提·吐尔逊仔细聆听，不时抬手点拨。“现在生意红火，老街的人气又回来了。”买买提说。，详情可参考夫子
Skyward Wildfire has a bold plan to prevent wildfires: stop the lightning that causes them. The Vancouver-based startup raised $5.7 million claiming it can prevent lightning strikes using cloud seeding with aluminum-coated glass fibers—the same military chaff used to jam radar systems.