Error: Can't use an expression of type 'void Function()?' as a function because it's potentially null.

When binding a nullable Function property inference should remove the?

(when-some [cb (-> (m/ContextMenuButtonItem .onPressed nil) .-onPressed)]
    (cb))

will generate

final void Function()? some$6054_$AUTO_$1=const f_material.ContextMenuButtonItem(onPressed: null, ).onPressed;
if((null == some$6054_$AUTO_$1)){
return null;
}
final void Function()? cb$1=some$6054_$AUTO_$1;
return cb$1();

Which throws at compile time

Try calling using ?.call instead.
Performing hot reload...                                        
return cb$1();
           ^
Try again after fixing the above error(s).

Reproduce the Clojure expression and inspect the generated Dart shown in the issue, focusing on nullable Function binding and the resulting call. Start by tracing how this expression is compiled, then verify that the generated output compiles and that the nullable callback case no longer produces the reported error.