Directory(savedDir).existsSync()

I've added as per this #249
I've added all params. I want to download this to internal storage.
My code is

var localPath = await getApplicationDocumentsDirectory(); // /data/user/0/com.example.app/app_flutter
var fileName = "landscapeVid.mp4";

await FlutterDownloader.enqueue(
url: url,
savedDir: localPath.toString(),
showNotification: true,
fileName: fileName,
openFileFromNotification: true,
saveInPublicStorage: false
);

getting this error :
'package:flutter_downloader/src/downloader.dart': Failed assertion: line 107 pos 12: 'Directory(savedDir).existsSync()': savedDir does not exist

Start at package:flutter_downloader/src/downloader.dart line 107 and compare the savedDir passed to FlutterDownloader.enqueue with the path returned by getApplicationDocumentsDirectory(). Reproduce the assertion on Android with the supplied options; done means determining the cause and documenting or correcting the plugin's handling of this path.

Written by the indexing model from the issue text.