For me, an implicit way to convert between similar, but not identical, types. A real-world open source example I am aware of having a similar issue is Upspin[1]

For me, an implicit way to convert between similar, but not identical, types. A real-world open source example I am aware of having a similar issue is Upspin[1]. There are ways to mitigate this, but you (well, I) cannot always control all the types third-party dependencies rely on. There is a clear path to working around this case, but I find it to be a bit tedious. I miss languages where, through generics, duck-typing, or similar that I can simply pass the application's structure to the third-party library and it "just works". [1] https://github.com/upspin/upspin/blob/master/upspin/proto/proto.go https://github.com/upspin/upspin/blob/master/upspin/proto/pr...