owningnonnull - Robuta Search

https://bugzilla.mozilla.org/show_bug.cgi?id=1838703 1838703 - Bindings::SetAsFoo() methods that return OwningNonNull/NonNull should be [[nodiscard]] RESOLVED (jgilbert) in Core - DOM: Bindings (WebIDL). Last updated 2023-06-22. bindings methods