/**
* Main Pootle PB Page Customizer Add-on Instance
*
* Ensures only one instance of Storefront_Extension_Boilerplate is loaded or can be loaded.
*
* @since 1.0.0
* @return PPB_Page_Customizer_Addon instance
*/
public static function instance()
{
if (null == self::$_instance) {
self::$_instance = new self();
}
return self::$_instance;
}
