public function update( &$zone ) {
		global $wpdb;
		if ( $zone->get_id() ) {
			$wpdb->update(
				$wpdb->prefix . 'woocommerce_shipping_zones',
				array(
					'zone_name'  => $zone->get_zone_name(),
					'zone_order' => $zone->get_zone_order(),
				),
				array( 'zone_id' => $zone->get_id() )
			);
		}
		$zone->save_meta_data();
		$this->save_locations( $zone );
		$zone->apply_changes();
		WC_Cache_Helper::invalidate_cache_group( 'shipping_zones' );
		WC_Cache_Helper::get_transient_version( 'shipping', true );
	}