src/Providers/ToastrServiceProvider.php
public function register()
    {
        $this->app->singleton('toastr', function ($app) {
            return new Toastr($app->session, $app->config);
        });
    }
public function register()
    {
        $this->app->singleton('toastr', function ($app) {
            return new Toastr($app->session, $app->config);
        });
    }
Register the application services.

@return void