So does the 2nd part's example snippet use transactions or what? Seems pretty dubious, even for an example. With Node.js I pass a function as a parameter to a t

So does the 2nd part's example snippet use transactions or what? Seems pretty dubious, even for an example. With Node.js I pass a function as a parameter to a transactional exec and any failure should rollback the whole thing. Don't know if that's the same with Go.