稍后整理：
参考:
https://blog.csdn.net/zhou2s_101216/article/details/38467715
https://www.cnblogs.com/wolf-sun/p/UML-collaboration-diagram.html
https://www.cnblogs.com/jiangds/p/6596595.html
https://zhuanlan.zhihu.com/p/135348779
https://zhuanlan.zhihu.com/p/78243709
https://zhuanlan.zhihu.com/p/149079804
https://zhuanlan.zhihu.com/p/109655171
https://www.cnblogs.com/darrenji/p/4729149.html
