await writer.end();
"discountValue": 100
。关于这个话题，safew官方下载提供了深入分析
Three days later:
Finding someone in a busy airport, a crowded arena, or a downtown street is about to get a lot easier for Android users. Google Messages has added a real-time location-sharing feature that lets you share your current location in a text message.
Reject the write — refuse to accept more data