Update solution 6.

[martinbonnin]

Update solution 6. As I understand, it also relies on a request parameter as well as introspection changes.

Also added my name as a champion here since it was empty. If anyone feels strongly about this solution, I'm happy to relinquish the "championability"!

[benjie]

I've been acting champion of this (e.g. here), and if it's the solution that we select then I plan to implement it on top of the work I've already done. To me, * and @semanticNonNull are variants of the same proposal, only really differing in terms of the syntax through which they're exposed. That said, if we get it down to * vs @semanticNonNull I will be arguing for * so it makes sense for you to champion @semanticNonNull against me if you truly feel it's the superior solution 👍

[martinbonnin]

I've been acting champion of this (e.g. #1700 (comment)), and if it's the solution that we select then I plan to implement it on top of the work I've already done.

Excellent 👍 No need for 2 champions there, especially since you know the implementation already. I was mainly filling the void. I made you the champion.