protected function registerFacades()
    {
        // Since Laravel 5.4 allows for automatic Facade
        // we do not need to register Facades here.
        if ($this->app->version() >= 5.0 && $this->app->version() < 5.4) {
            // Add Facade.
            $this->app->booting(function () {
                AliasLoader::getInstance()->alias(PersonalityInsights::SERVICE_ID, PersonalityInsightsFacade::class);
            });
        }
    }