stopLogging method
void
stopLogging()
Implementation
void stopLogging() async {
final directory = await getExternalStorageDirectory();
if (directory == null) return;
final timestamp = DateTime.now().millisecondsSinceEpoch;
final filePath = '${directory.path}/network_log_$timestamp.txt';
final file = File(filePath);
await file.writeAsString(_log.join('\n'));
}