App\Providers\ThemeServiceProvider::registerBlankTheme PHP Method

    protected function registerBlankTheme()
    {
        /** @var PluginRegister $registryManager */
        $registryManager = $this->app['xe.pluginRegister'];
        $blankThemeClass = $this->app['config']->get('xe.theme.blank');
        $registryManager->add($blankThemeClass);
    }