如何使用laravel添加自定义门面和服务提供者

<?phpnamespace App\Utils;class ToolBar{
   public function get()
   {
       return 'Hello my facade';
   }}

<?phpnamespace App\Providers;use Illuminate\Support\ServiceProvider;use App\Utils\ToolBar;class ToolServiceProvider extends ServiceProvider{
   /**
    * Bootstrap the application services.
    *
    * @return void
    */
   public function boot()
   {
       //
   }

   /**
    * Register the application services.
    *
    * @return void
    */
   public function register()
   {
       $this->app->bind('tool',function(){
           return new ToolBar();
       });
   }}

App\Providers\ToolServiceProvider::class,

<?phpnamespace App\Facades;use Illuminate\Support\Facades\Facade;class Tool extends Facade{
   protected static function getFacadeAccessor()
   {
       return 'tool';
   }}

'Tool' => App\Facades\Tool::class,

Artisan::command('testFacade',function(){
    dd(tool::get());});

php artisan testFacade