Order ids to migrate.
	 * @return void
	 *
	 * @deprecated 8.0.0 Use `fetch_sanitized_migration_data` and `process_migration_data` instead.
	 */
	abstract protected function process_migration_batch_for_ids_core( array $entity_ids ): void;

	/**
	 * Check if the amount of processed database rows matches the amount of orders to process, and log an error if not.
	 *
	 * @param string     $operation Operation performed, 'insert' or 'update'.
	 * @param array|bool $received_rows_count Value returned by @wpdb after executing the query.
	 * @return void
	 */
	protected function maybe_add_insert_or_update_error( string $operation, $received_rows_count ) {
		if ( false === $received_rows_count ) {
			$this->add_error( "$operation operation didn't complete, the database query failed" );
		}
	}
}