{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"let"}]}
        let ty = self.lower_ty(ty, ImplTraitContext::Disallowed(impl_trait_position));
    ) -> (&'hir hir::Ty<'hir>, hir::BodyId) {
        (ty, self.lower_const_body(span, body))