title: Nested forms with Vaadin / display contents of a collection
body: <p>I would like to display a complex Java Bean in a Vaadin form so that the user can edit the bean. However the bean consists of simple properties (String, Integer and so on), but also of a collection of yet another bean (though this has only simple properties).</p>
  
  <p>What I like to do know is to display a table which contains the simple properties of the nested bean in its columns. Each row displays one instance of the nested bean. Of course there has to be a way to add new rows (append to the collection) and remove rows (remove from the collection).</p>
  
  <p>I've done some research how this can be achived with Vaadin. However, to no success. Is there a kind of pattern which solves this problem? What steps have to be taken?</p>