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«interface» IMultiFunctionDevice Every device below is forced to implement all three methods.
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Click any method on a device
In Fat interface mode every device must implement print(), scan() and fax() — even the ones it can't really do. Click a method to see what happens.
▸ A forced stub is a method a class is made to implement but can only answer with "not supported". ISP says: split the fat interface so no class is ever forced.