Newspeak is intended to be statically typed, presumably optionally/gradually. I think the implementation is missing right now, though the syntax already allows type annotations.
As the other commenter wrote, the answer is that modules can never "import" concrete modules, only interfaces. And that means some extra effort, though having type-inference assist with the construction of that module should help. Definitely something that needs figuring out.
IMHO, explicit composition is something we really need to figure out in general, and it should solve the weird mix of linguistic and extra-linguistic mechanisms we have now.
As the other commenter wrote, the answer is that modules can never "import" concrete modules, only interfaces. And that means some extra effort, though having type-inference assist with the construction of that module should help. Definitely something that needs figuring out.
IMHO, explicit composition is something we really need to figure out in general, and it should solve the weird mix of linguistic and extra-linguistic mechanisms we have now.