Twitter\WordPress\PluginLoader::widgetsInit PHP Метод

    public static function widgetsInit()
    {
        $features = \Twitter\WordPress\Features::getEnabledFeatures();
        if (isset($features[\Twitter\WordPress\Features::FOLLOW_BUTTON])) {
            register_widget('\\Twitter\\WordPress\\Widgets\\Buttons\\Follow');
        }
        if (isset($features[\Twitter\WordPress\Features::PERISCOPE_ON_AIR])) {
            register_widget('\\Twitter\\WordPress\\Widgets\\Buttons\\PeriscopeOnAir');
        }
    }