For reason (search-replace?) https://commits.webkit.org/270396@main renamed it to isRenderRubyBase()
Pull request: https://github.com/WebKit/WebKit/pull/20826
Committed 271061@main (e6ad074619f4): <https://commits.webkit.org/271061@main> Reviewed commits have been landed. Closing PR #20826 and removing active labels.
<rdar://problem/118723830>