Illuminate\Bus\Dispatcher::mapUsing PHP Метод

    public function mapUsing(Closure $mapper)
    {
        $this->mapper = $mapper;
    }

 /**
  * Bootstrap any application services.
  *
  * @param  \Illuminate\Bus\Dispatcher  $dispatcher
  * @return void
  */
 public function boot(Dispatcher $dispatcher)
 {
     $dispatcher->pipeThrough([CommandValidationPipe::class]);
     $dispatcher->mapUsing(function ($command) {
         return Dispatcher::simpleMapping($command, 'App\\Commands', 'App\\Handlers\\Commands');
     });
 }