Follow-up from "Prevent closing of merged merge requests"
The following discussion from !208810 should be addressed:
- [ ] @dstull started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/208810#note_2849852044): (+5 comments)
> **question:**
>
> in `app/services/issuable_base_service.rb` version of this there is a case where it seems like it is trying to cover the idea of there being an `else` condition and the service class not existing.
>
> See [here](https://gitlab.com/gitlab-org/gitlab/blob/3e6994534f9046250dff8e29e4a8f65fc82cdb52/app/services/issuable_base_service.rb#L478-478)
>
> Is there a need for this here, or is that invalid for our case here?
issue