+---------------+
       | BaseMenu      |                    +----------------+
       +---------------+                    |   MenuItem     |
             +        +                     +----------------+
             |        |
   +---------v--+    +v-------------+
   | Menu       |    |   RadioMenu  |
   +------------+    +--------------+


                     +---------------------+
                     |CompositeMenu        |
                     +---------------------+