{"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"let"}]}
                let missing_trait = trait_def_id
                let (_, trait_def_id) = lang_item_for_binop(self.tcx, op);
                    .map(|def_id| with_no_trimmed_paths!(self.tcx.def_path_str(def_id)));