if requirementsAndInfo.key is nullable, that check inside the if is not sufficient to convince the parser that I did in fact check for nullability

Is it

var

?

no in this case it’s val

I guess that's the risk with a potentially multithreaded application - I think it won't give that warning for a local variable but for a field it can't provide a safety guarantee.

requirementsAndInfo.key?.let { rTitleTv.text = it }

sure that’s a tighter way of writing it

you dont need the surrounding 'if' and the compiler error is gone