There should be a way for a KAbstractFileItemActionPlugin to provide feedback whether an action succeeded or failed, so e.g. Dolphin could show a message widget or highlight a newly created file or something.

Use case:
When sharing a file in Dolphin using Purpose, it then has to show a KNotification in case of error. Ideally, this was instead done as a KMessageWidget in Dolphin in response to a signal of some sort.

Other potential usecase:
When creating a compressed file, it could then show a success message and/or then automatically select the newly created file.