{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"LangItem::AsyncFnMut"}]}
            LangItem::AsyncFnMut => Some(ty::ClosureKind::FnMut),
            LangItem::AsyncFn => Some(ty::ClosureKind::Fn),
            LangItem::AsyncFnOnce => Some(ty::ClosureKind::FnOnce),