How does a Gmail message Id or ThreadId map to the new Gmail UI?

Question

Edit: addressing the first comment below and for clarity, this isn\'t a code question. The question is simply:

What do I put into t

Answer 1

Thanks to @frank-szilinski - he pointed out that the old format is now translated. I.e. this now works again:

https://mail.google.com/mail/ca/u/1/#drafts/1661237c4db71ace

It doesn't seem to work when the Gmail tab isn't already open, however.