Re: [PATCH v3 0/1] MR3391: mshtml: implement window.MutationObserver with MutationObserver stub

[Gabriel Ivăncescu]

Gabriel Ivăncescu (@insn) commented about dlls/mshtml/mshtml_private_iface.idl:
> HRESULT warn([in, optional] VARIANT *varargStart);
>  }
>
> +[
> +    odl,
> +    oleautomation,
> +    dual,
> +    hidden,
> +    uuid(6ac5491e-1758-4b82-98a2-83e31a7c8871)
> +]
> +interface IWineMSHTMLMutationObserver : IDispatch
> +{
> +}
> +

As above, this is not needed for the constructor.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/3391#note_39942