C1-Released ABAP Object Filtering

C1-Released ABAP Object Filtering is a technique for narrowing down ABAP repository objects — such as classes implementing a given interface — to only those that carry a C1 release contract, meaning they are officially released for use in custom development. A developer uses it when retrieving a list of all classes implementing an interface to ensure that only stable, supported APIs are considered, rather than internal or unreleased objects.