One of the benefits of being an Oracle Cloud Applications customer is that all the upgrade work is taken care of, requiring you just to decide how and when to implement the new features and to plan the appropriate testing. Obviously upon upgrade of your application and of all other integrated applications, you'll need to test that they all still work together as they did before. As your portfolio of integrated systems evolve over time, as does their service interfaces, with method changes, additions, and occasionally deprecations possible.
Application Composer helps you with this by providing a small feature that re-reads the WSDL configured for your defined web services and makes sure the groovy palette shows any updates to the operations and service interface definitions.
You can access this feature from the Web Services link in the left-hand sidebar, under Common Setup. As shown below from here the gear icon can be used to refresh each web service.
In addition you can use this to update a web service defined by another user to ensure you have the most recent specification exposed to your session.
For more details on the web services supplied with Fusion Application use OER to review the service definitions by release and starting with Release 10 this same information is included inside the application with the Developer Connect functionality. More on this in our dedicated Release 10 articles soon.