This class, named as Void<Service_Name>Ext, is provided out of the box for each application service. This class implements the aforementioned service extension interface without any business logic viz. the implemented methods are empty.

The default extension is a useful & convenient mechanism to implement the pre and / or post extension hooks for specific methods of an application service. Instead of implementing the entire interface, one should extend the default extension class and override only required methods with the additional business logic. Product developers do not implement any logic, including product extension logic, inside the default extension classes.

For example