Avoids separate templated-type helpers.
Pull request: https://github.com/WebKit/WebKit/pull/5083
<rdar://problem/101123966>
Committed 255496@main (b807bfd9ce0a): <https://commits.webkit.org/255496@main> Reviewed commits have been landed. Closing PR #5083 and removing active labels.
*** Bug 245044 has been marked as a duplicate of this bug. ***