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Defining interfaces
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6 Click OK.
Adding an operation to an interface
An operation is the implementation of a service that can be requested from
any object of the class in order to affect behavior.
You can add operations that already exist in the model and which belong to
other objects.
v To add an operation to an interface:
1 Double-click an interface in the model.
The interface property sheet appears.
2 Click the Operations tab.
The Operations page appears.
3 Click the Add Operations tool.