When dealing with multiple repositories and multiple versions of our Python tooling, it may become nessesary to optionally pass arguments to a function based on if that function supports the argument in question.
<rdar://problem/105138155>
Pull request: https://github.com/WebKit/WebKit/pull/9771
Committed 259979@main (3ac8172d4ae6): <https://commits.webkit.org/259979@main> Reviewed commits have been landed. Closing PR #9771 and removing active labels.
Committed 259548.65@safari-7615-branch (01d5044dbe0d): <https://commits.webkit.org/259548.65@safari-7615-branch> Reviewed commits have been landed. Closing PR #366 and removing active labels.