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

>>  > Maybe by naming it as internal: display-buffer--alist?
>>  > Or if it's too confusing, then maybe display-buffer-internal-alist?
>>
>> But we want to advertise it in the manual and we usually don't do that
>> for internal variables.
>
> What about `display-buffer-program-alist'?  I think it makes it clear
> that it is intended to be used from Elisp code.

Or maybe simply `display-buffer-prog-alist' like in `prog-mode'.
(However, this is related to modes for program languages.)
Another variant is `display-buffer-override-alist'.