{"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"match"}]}
        match self.as_lang_item(id)? {
    pub fn fn_trait_kind_from_def_id(self, id: DefId) -> Option<ty::ClosureKind> {
            LangItem::Fn => Some(ty::ClosureKind::Fn),