/**
* Returns a singleton reference of this class.
*
* @author Stefan Herndler
* @since 1.0.0
* @return WPT_Ajax
*/
public static function singleton()
{
// initialize singleton if first call
if (!self::$a_obj_Singleton instanceof WBR_Ajax) {
self::$a_obj_Singleton = new self();
}
// return the singleton of this class
return self::$a_obj_Singleton;
}
