I think `SlotAssignment::enqueueSlotChangeEvent()` is unused.
Created attachment 418250 [details] Patch
<rdar://problem/73681505>
Comment on attachment 418250 [details] Patch r=me
Committed r272130: <https://trac.webkit.org/changeset/272130> All reviewed patches have been landed. Closing bug and clearing flags on attachment 418250 [details].