Flutter feature discovery - DescribedFeatureOverlay for BottomNavigationBarItems

I'm using the package feature_discovery at version ^0.12.1. In order to display the feature discovery overlay, I need to wrap the BottomNavigationBarItem with a DescribedFeatureOverlay. However the BottomNavigationBar's items require a list of type BottomNavigationBarItem:

Scaffold(
      [...]
      bottomNavigationBar: BottomAppBar(
        [...]
        child: BottomNavigationBar(
          [...]
          items: [
            DescribedFeatureOverlay( // This does not work because items requires type BottomNavigationBarItem
              [...]
              child: BottomNavigationBarItem(
                icon: Icon(item.icon),
                label: item.title,
              ),
            ),
          ],
        ),
      ),
    );

The valid code would be like this:

Scaffold(
  [...]
  bottomNavigationBar: BottomAppBar(
    [...]
    child: BottomNavigationBar(
      [...]
      items: [
        BottomNavigationBarItem( // need to wrap this with DescribedFeatureOverlay
          icon: Icon(item.icon),
          label: item.title,
        ),
      ],
    ),
  ),
);

I've been trying for so long now to find a solution to this. How can I wrap the BottomNavigationBarItem with the DescribedFeatureOverlay? Is this a limitation of Flutter or is there a way of doing this?

Do I need to copy, extend and modify the BottomNavigationBar class and use that one in order to achieve this?

As workaround you can wrap icon widget of BottomNavigationBarItem like that

 BottomNavigationBarItem(
            icon: DescribedFeatureOverlay(
              featureId: item.featureId,
              title: Text(item.title),
              description: Text(item.description),
              backgroundColor: item.color,
              tapTarget: Icon(item.icon),
              child: Icon(item.icon),
            ),
            label: item.title,
          );