{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"LangItem::AsyncFnMut"}]}
            LangItem::AsyncFnMut => Some(FnTrait::AsyncFnMut),
            LangItem::AsyncFnOnce => Some(FnTrait::AsyncFnOnce),
            LangItem::AsyncFn => Some(FnTrait::AsyncFn),