public function __construct() {
		add_action( 'woocommerce_order_status_changed', array( $this, 'save_attendee_meta_to_order' ), 5, 2 );
		add_action( 'woocommerce_checkout_update_order_meta', array( $this, 'save_attendee_meta_to_order' ), 5 );
		add_action( 'event_tickets_woocommerce_ticket_created', array( $this, 'save_attendee_meta_to_ticket' ), 10, 4 );
	}