如何将multi_image_picker2 `资产`转换为`File`对象？

dependencies:
  multi_image_picker2: ^4.8.1

import 'package:multi_image_picker2/multi_image_picker2.dart';
import 'dart:typed_data';

Future<Uint8List> getImageBytes(Asset asset) async {
  ByteData byteData = await asset.getByteData();
  return byteData.buffer.asUint8List();
}

import 'package:path_provider/path_provider.dart';
import 'dart:io';

Future<File> getAssetFile(Uint8List byteData) async {
  Directory tempDir = await getApplicationDocumentsDirectory();
  String tempPath = tempDir.path;
  File file = File('$tempPath/temp.jpg');
  await file.writeAsBytes(byteData);
  return file;
}

Asset asset = ...; // 获取的图片 Asset 对象
Uint8List byteData = await getImageBytes(asset);
File file = await getAssetFile(byteData);