Attaching a bean with Form

Vaadin 6 / 7 / 8 Framework Data Binding
1

I have a bean which has one inner bean. I would like to bind the parent bean
to a form. In the form, I need to display parent bean properties as well as
inner bean properties.
How it can be done?

2

Maybe
this post
 might help you.

3

Also the
CustomField
 component might be of use, although it is lacking examples (e.g. how to use it to implement nested forms).

4

I have used the CustomField add-on now I am able to display the fields in the inner bean as a sub form.
But commit or discard operations are not happening with the sub form.

I am not finding the solution for it.