{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"self.arena.alloc(hir::Expr"}]}
                    self.arena.alloc(hir::Expr { hir_id: self.next_id(), kind, span: head_span })
                    let kind = self.make_lowered_await(head_span, iter, FutureKind::AsyncIterator);
                }