Laravel: Load development only packages

DevelopmentServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Foundation\AliasLoader;
use Illuminate\Support\ServiceProvider;

class DevelopmentServiceProvider extends ServiceProvider
{
    protected $providers = [
        \Barryvdh\Debugbar\ServiceProvider::class
    ];

    protected $facades = [
        'Debugbar' => \Barryvdh\Debugbar\Facade::class
    ];

    /**
     * Bootstrap the application services.
     *
     * @return void
     */
    public function boot()
    {
        //
    }

    /**
     * Register the application services.
     *
     * @return void
     */
    public function register()
    {
        if ($this->app->environment() == 'local') {
            foreach ($this->providers as $provider) {
                $this->app->register($provider);
            }

            $loader = AliasLoader::getInstance();

            foreach ($this->facades as $alias => $facade) {
                $loader->alias($alias, $facade);
            }
        }
    }
}