I would like to be able to filter our search results by "Marked as Official" so that our users can set the search scope to include only official content. I realize that structured outcomes already promote/demote content in the search results depending on how they are marked,. but I'm wondering if there is a way to customize the search results filters to include structured outcomes as a filter. For example, adding structured outcomes to the "Restrict results by" section in the screenshot below. Has anyone has any experience with this?