Modifying slug in resource class

class VendorResource extends Resource
{
    protected static ?string $model = Vendor::class;

    protected static bool $shouldRegisterNavigation = false;

    protected static ?string $slug = 'locations/{location}/vendors'

...
    public static function getPages(): array
    {
        return [
            'index' => Pages\ListVendors::route('/'),
            'create' => Pages\CreateVendor::route('/create'),
            'edit' => Pages\EditVendor::route('/{record}/edit'),
        ];
    }
}

 $items[] = NavigationItem::make('Vendors')
                ->icon('heroicon-o-truck')
                ->group($selectedLocation->name)
                ->isActiveWhen(fn (): bool => request()->routeIs('filament.app.resources.vendors.*'))
                ->url(VendorResource::getUrl('index', ['location' => $selectedLocation->id]));