Which configuration can you use to trigger a warning message based on custom logic?

A validation is a type of custom logic that enables you to generate error or warning messages in the system based on specific conditions. You can create a validation using the Custom Logic app and write your custom code using ABAP for key users. You can also test your validation using predefined test variants. For example, you can create a validation that triggers a warning message if the priority of a case is high and the due date is more than 10 days away. References = Working with Validations in the Service Cloud V2 Using Code Blocks; Custom Logic