How to teach WebStorm to correctly work with $index from the "ng-repeat" directive?

Question

Angular

I use the ng-repeat directive.
I get the value "$index". In general, everything works, only the IDE does not like this use of "$index".
How to wean her to highlight this place in red?
By pressing Alt-Enter there is no option "disable inspection", I say right away.

Answer 1

Everything works by pure chance. As Nikolai correctly noted , interpolation is not needed there.
menuCtrl.isSelected($index)