You can move attributes, methods and events of an interface to the implementing classes if required. For more information, see Class Diagram.
Note that moving interface methods that are redefined in subclasses requires further adjustments to the subclasses. The Assistant performs these adjustments for you.
If there is more than one subclass, you can move the selected components to all the classes implementing the interface in one step by dragging the components to the Implementing classes folder.
The selected components of the interface are created in the implementing classes.