,-----------------------------.                                             
|Class 1                      |  ,------------------------------.   ,------.
|-----------------------------|  |Class 2                       |   |IfaceA|
|                             |  |------------------------------|   |------|
|		 circle "Interface A" as Iface|circle "Interface B" as IfaceB|   `------'
`-----------------------------'  `------------------------------'       |   
                                                                        |   
                                                                        |   
                                                                    ,------.
                                                                    |IfaceB|
                                                                    |------|
                                                                    `------'