These have little advantage versus calling pickle directly (and lack some of the options), and are only used by the tests to ensure certain classes round-trip.
Created attachment 426132 [details] Patch
Committed r276081 (236593@main): <https://commits.webkit.org/236593@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 426132 [details].
rdar://76727229