s scheduled.
	 *
	 * @param int $order_id Order or refund ID.
	 * @return void
	 */
	public static function import( $order_id ) {
		$order = wc_get_order( $order_id );

		// If the order isn't found for some reason, skip the sync.
		if ( ! $order ) {
			return;
		}

		$type = $order->get_type();

		// If the order isn't the right type, skip sync.
		if ( 'shop_order' !== $type && 'shop_order_refund' !== $type ) {
			return;
		}

		// If the order has no id or date created, skip sync.
		if ( ! $order->get_id() || ! $order->get_date_created() ) {
			return;
		}

		$results = array(
			OrdersStatsDataStore::sync_order( $order_id ),
			ProductsDataStore::sync_order_products( $order_id ),
			CouponsDataStore::sync_order_coupons( $order_id ),
			TaxesDataStore::sync_order_taxes( $order_id ),
			CustomersDataStore::sync_order_customer( $order_id ),
		);

		ReportsCache::invalidate();
	}

	/**
	 * Delete a batch of orders.
	 *
	 * @param int $batch_size Number of items to delete.
	 * @return void
	 */
	public static function delete( $batch_size ) {
		global $wpdb;

		$order_ids = $wpdb->get_col(
			$wpdb->prepare(
				"SELECT order_id FROM {$wpdb->prefix}wc_order_stats ORDER BY order_id ASC LIMIT %d",
				$batch_size
			)
		);

		foreach ( $order_ids as $order_id ) {
			OrdersStatsDataStore::delete_order( $order_id );
		}
	}
}