{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"hir::ClosureKind::CoroutineClosure(hir::CoroutineDesugaring::Async)"}]}
            hir::ClosureKind::CoroutineClosure(hir::CoroutineDesugaring::Async)
            }
                if self.tcx.is_lang_item(def_id, LangItem::AsyncFnOnceOutput) =>