title: How to get download url of Thumbnail after firebase resize images extension completets
body: <p>The recently introduced firebase extension 'Image resize' produces a thumbnail once a picture is uploaded to a storage bucket.</p>
  
  <p>How do I obtain the download url of the image of this thumbnail, after the extension completes?</p>
  
  <pre><code>final StorageReference storageRef =
          FirebaseStorage.instance.ref().child(fileName);
  
      final StorageUploadTask uploadTask = storageRef.putFile(
        File(path),
      );
  
      final StorageTaskSnapshot downloadUrl = (await uploadTask.onComplete);
  
      final String url = (await downloadUrl.ref.getDownloadURL()); //This will give me the download url of file before resize
  
  // ??How do I the download url of resized image that gets stored in fileName/thumbnails folder
  
  </code></pre>