updateTrace method
update trace
Implementation
Future<void> updateTrace(Response response) async {
String? trace = response.headers.value(_TRACE_HEADER);
if (trace == null || trace == _traceCacheValue) {
return;
}
// 更新内存缓存和本地缓存的trace
_traceCacheValue = trace;
await _setLocalValue(_traceCacheKey, _traceCacheValue!);
}