Customize isActiveWhen on NavigationItem without replacing it in the navigation

Bad things happen when I use the custom navigation in my panel. But I need to access the

isActiveWhen

isActiveWhen

method on the navigation item to conditionally set a value. Is there a way to do this without defining it in the

navigationItems

navigationItems

on the panel?

Customize isActiveWhen on NavigationItem without replacing it in the navigation - Filament