run cd example/social-network && go run convert_plugin.go
step 2 would throw message followed
go: gitlab.com/webridge-git/api@v0.0.0-20181123203207-501884b46b27: reading https://goproxy.cn/gitlab.com/webridge-git/api/@v/v0.0.0-20181123203207-501884b46b27.mod: 404 Not Found
cd example/social-network && go run convert_plugin.go