How to add names for routes in groups

[dragomano]

Describe the bug

This works:

app()->get('/', ['name' => 'home', function () {
    render('index');
}]);

And this doesn't work:

app()->group('/admin', ['name' => 'admin', function () {
    app()->resource('/users', 'UsersController');
}]);

Expected behavior

I want to get routes such like these:

• admin.users.index
• admin.users.create
• etc