bug#81512: [PATCH] Add command `outline-occur'

> But I'm not 100% convinced
>
> - that we really never want to set this buffer-locally or globally

Indeed, I see no reason to warn against setting it
buffer-locally or globally by a package.

> - and we consequently should name it differently.

Maybe by naming it as internal: display-buffer--alist?
Or if it's too confusing, then maybe display-buffer-internal-alist?