{"ast_node_type":"other","tokens":[{"end":9,"kind":"keyword","start":0,"text":"{"}]}
        {
        for (arg_pat, arg_ty) in args.iter().zip(bound_sig.substitution.0.as_slice(Interner).iter())
            self.infer_top_pat(*arg_pat, arg_ty.assert_ty_ref(Interner), None);