*/ public static function event_types(): array { return array( self::STARTED => 'Membership Started', self::CHANGED => 'Membership Changed', self::CANCELLED => 'Membership Cancelled', self::PAUSED => 'Membership Paused', self::RESUMED => 'Membership Resumed', self::EXPIRED => 'Membership Expired', self::REFUNDED => 'Membership Refunded', self::LEVEL_SAVED => 'Membership Level Saved', self::LEVEL_DELETED => 'Membership Level Deleted', ); } }