update static method
Обновление файла
Implementation
static Future<String> update(
String folder,
String oldFile,
String newFile,
) async {
await delete(folder, oldFile);
final tempDir = await tempFolder;
final name = newFile.split('/').last.split('.').first;
final ext = getFileExt(newFile);
final fileName = '$name$ext';
final destPath = '$tempDir/$folder/$fileName';
await File(newFile).copy(destPath);
return fileName;
}