{"ast_node_type":"variable","tokens":[{"end":66,"kind":"keyword","start":0,"text":"let"}]}
            let unambig = $kind::$variant::<'_, ()> { $($init)* };
        fn $name() {
            let unambig_to_ambig = unsafe { std::mem::transmute::<_, $kind<'_, AmbigArg>>(unambig) };