{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"LangItem::Fn"}]}
            LangItem::Fn => Some(FnTrait::Fn),
            LangItem::FnMut => Some(FnTrait::FnMut),
            LangItem::AsyncFnOnce => Some(FnTrait::AsyncFnOnce),