/**
  * Singleton constructor method for the class.
  *
  * @return Tribe__Events__Pro__Recurrence__Validator
  */
 public static function instance()
 {
     if (empty(self::$instance)) {
         self::$instance = new self();
     }
     return self::$instance;
 }
 public function is_valid($event_id, array $recurrence_meta)
 {
     return Tribe__Events__Pro__Recurrence__Validator::instance()->is_valid($event_id, $recurrence_meta);
 }