{"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"self.infcx"}]}
            self.infcx
            let drop_trait = self.tcx.require_lang_item(hir::LangItem::Drop, closure_span);
                .type_implements_trait(drop_trait, [ty], self.tcx.param_env(closure_def_id))