protected function update_post_meta( &$order ) {
		$updated_props     = array();
		$meta_key_to_props = array(
			'_order_currency'     => 'currency',
			'_cart_discount'      => 'discount_total',
			'_cart_discount_tax'  => 'discount_tax',
			'_order_shipping'     => 'shipping_total',
			'_order_shipping_tax' => 'shipping_tax',
			'_order_tax'          => 'cart_tax',
			'_order_total'        => 'total',
			'_order_version'      => 'version',
			'_prices_include_tax' => 'prices_include_tax',
		);

		$props_to_update = $this->get_props_to_update( $order, $meta_key_to_props );

		foreach ( $props_to_update as $meta_key => $prop ) {
			$value = $order->{"get_$prop"}( 'edit' );
			$value = is_string( $value ) ? wp_slash( $value ) : $value;

			if ( 'prices_include_tax' === $prop ) {
				$value = $value ? 'yes' : 'no';
			}

			$updated = $this->update_or_delete_post_meta( $order, $meta_key, $value );

			if ( $updated ) {
				$updated_props[] = $prop;
			}
		}

		do_action( 'woocommerce_order_object_updated_props', $order, $updated_props );
	}