How to use ValidationNotificationHandler

[LearningProcesss]

Hi,
while reading the book i stumbled around ValidationNotificationHandler.
Something that is missing both book and repo is the actual implementation of ValidationNotificationHandler.
What should be done inside handleError(String aNotificationMessage) ?

Thank you all.

[VaughnVernon]

@LearningProcesss This is used by a Mediator of validation behavior. The client of the validator passes in an object that implements the interface, and the validator dispatches to the ValidationNotificationHandler on every validation error. I don't recall if the current examples use this at all, but it should be simple enough to clone the repository and search of the four projects.