title: Android Databinding with menus
body: <p>I'm testing out the new Data Binding feature built into Android. I've successfully done simple binding to text views, and even two-way binding, and binding a <code>List&lt;&gt;</code> to a <code>RecyclerView</code>. Now I want to test it with a menu view, but when I add a layout XML file to the menu folder, I see the menu and the item I added, but when I just wrap the contents of that menu view with a <code>&lt;layout&gt;</code> tag, it says the "Element layout must be declared". I didn't have to make a special declaration on the other layouts I've tested. which suggests that you can't use it with layouts in the menu folder. Is that the case, or am I missing something?</p>