api.WebTransportSendStream - No "proper" getWriter support in Firefox?

What type of issue is this?

Incorrect support data (example: BrowserX says "86" but support was added in "40")

What information was incorrect, unhelpful, or incomplete?

BCD argues WebTransportSendStream.getWriter is supported in Firefox and upcoming Safari

What browsers does this problem apply to, if applicable?

Firefox

What did you expect to see?

No support, and/or some note about it

Did you test this? If so, how?

https://searchfox.org/firefox-main/rev/45bf222c56da5257156206bc795b94dcce003b0c/dom/webidl/WebTransportSendReceiveStream.webidl
https://searchfox.org/wubkat/rev/7615722754d2c3ec9ae3385733d0e3a98dc997e3/Source/WebCore/Modules/webtransport/WebTransportSendStream.idl

No getWriter support in either browsers (but only inherited by WritableStream)

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

No response

Do you have anything more you want to share?

I'd probably mark it unsupported and add a note that the support only comes from WritableStream. One could say "partially supported" but it's not machine readable to tell whether the override is implemented or not that way.

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/WebTransportSendStream

MDN metadata

Start with the BCD entry for api.WebTransportSendStream and compare its getWriter data with the Firefox and Safari WebIDL links in the issue. Confirm how inherited WritableStream support is represented, then update the compatibility data and add any appropriate note; run the repository's data validation checks to verify the entry.