Hi. I see from the org-mode 9.0 changelog that the "org-completion-use-ido" option was removed:

Remove all options related to ido or iswitchb
This includes org-completion-use-iswitchb and org-completion-use-ido. Instead Org uses regular functions, e.g., completion-read so as to let those libraries operate.

However, I'm unclear from the changelog and I haven't found any other documentation about how to restore the functionality that this option used to enable. I have tried ido-completing-read-plus/ido-ubiquitous, but that is overkill because it tries to enable ido everywhere, but I just want to re-enable ido for org-mode completion (mainly refile). I also run into the same problem if I try to set the completing read function to the one from ido globally.

What is the best way to restore the functionality of the now removed "org-completion-use-ido" option?