downloadFile method 
    
    
    
  Implementation
  @override
Future<bool> downloadFile(String fileId, String saveName, {String? bucketId}) async {
  try {
    await initialize();
    if (kIsWeb) {
      Uint8List? targetBytes = await getFileBytes(fileId, bucketId: bucketId);
      String targetUrl = Url.createObjectUrlFromBlob(Blob([targetBytes]));
      AnchorElement(href: targetUrl)
        ..setAttribute("download", saveName)
        ..click();
      Url.revokeObjectUrl(targetUrl);
      return true;
    }
  } catch (error) {
    logger.info("error at Storage.downloadFile >>> $error");
  }
  return false;
}