Laravel 5.8 Policy Guesser For Using "Models" Directory

AuthServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Gate;

class AuthServiceProvider extends ServiceProvider
{
    /**
     * Register any authentication / authorization services.
     *
     * @return void
     */
    public function boot()
    {
        $this->registerPolicies();

        /**
         * generate a Policy class name in the App\Policies namespace
         *
         * 1) keep the model heirarchy if it is App\Models:
         *    example: App\Models\Foo\Bar -> App\Policies\Foo\BarPolicy
         *
         * 2) fallback and provide App\Policies for non-App\Models:
         *    example: Laravel\Nova\Actions\ActionEvent -> App\Policies\ActionEventPolicy
         */
        Gate::guessPolicyNamesUsing(function ($modelClass) {
            return Str::startsWith($modelClass, 'App\Models')
                ? 'App\Policies\\' . str_replace('App\Models\\', '', $modelClass) . 'Policy'
                : 'App\Policies\\' . class_basename($modelClass) . 'Policy';
        });
    }
}

I would add use Illuminate\Support\Str; on top. Thanks.