/**
  * Creates an instance of this class if needed
  * @return Object Instance of this class
  */
 public static function instance()
 {
     if (!self::$instance) {
         self::$instance = new self();
     }
     return self::$instance;
 }
function acffef_free_activation_hook()
{
    ACFFrontendFormActivation::intro_notice();
}