Original code contains more. (::). Personally I don't understand why there are `::` and `.` to access deeper namespace levels. It's a static language, compiler should know how to resolve attributes and `.` should be enough for all cases.
It's because then you could have name collisions between variables and modules. E.g. it's ambigious whether io.Error is in a module called io, or a field of a variable called io. Which means you can no longer use fully qualified names regardless of context.
