{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
        let inputs = self.arena.alloc_from_iter(inputs.iter().map(|ty| {
        let ParenthesizedArgs { span, inputs, inputs_span, output } = data;
            self.lower_ty_direct(ty, ImplTraitContext::Disallowed(ImplTraitPosition::FnTraitParam))