{"ast_node_type":"function","tokens":[{"end":96,"kind":"keyword","start":0,"text":"///"}]}
    /// the local scope), but if we find the same name multiple times, like in `fn foo(i8, i8)`,
    /// the parameters are *names* (so we don't emit errors about not being able to find `b` in
    /// we deduplicate them to not complain about duplicated parameter names.