Is your feature request related to a problem? Please describe.

This function does the opposite of what its name promises.

Describe the solution you'd like

Remove it in a .0 version. If there are actual users, they'll notice and tell us if it's important.

Describe alternatives you've considered

• Mark it as deprecated. But it's not even documented, nor there are actual Google search results about it.
• Fix it. But this could silently break something until someone maybe notices.

Additional context

• Fix broken downtime comment sync #10000 (review)
• DependencyGraph: switch "parent" and "child" terminology #10263 (comment)