Shipping broken. FilePicker.getFile() doesn't exist

[cyberalt1]

  final file = await FilePicker.getFile();
  try {
    final thumbnail = await FilePreview.getThumbnail(file.path);
    setState(() {
        image = thumbnail;
        });
  } catch (e) {
    image = Image.asset("");
  }

Filepicker.getFile() doesn't exist
Code is copied and pasted from the pub.dev page