{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"self.opt_item_ident(def_id).unwrap_or_else(||"}]}
        self.opt_item_ident(def_id).unwrap_or_else(|| {
        let def_id = def_id.into_query_param();
            bug!("item_ident: no name for {:?}", self.def_path(def_id));