参考
什么是 声明式API？
https://www.modb.pro/db/212870
https://www.mianshigee.com/tutorial/learning-cloudnative/7bb7c6d9505bf389.md
从年会看声明式编程(Declarative Programming)
https://zhuanlan.zhihu.com/p/26085755
编程范式：命令式编程(Imperative)、声明式编程(Declarative)和函数式编程(Functional)
https://www.cnblogs.com/sirkevin/p/8283110.html
命令式和声明式，哪个才是你的菜？
https://blog.csdn.net/weixin_45443931/article/details/98869353
