Haketilo

        const [initial_mappings, initial_blocking] = arguments.slice(0, 2);

        let mappingchange, blockingchange;

            mappingchange = cb;

            return [{}, initial_mappings];

        const identifiers = arguments[0];

        async function remove_items()

        {

            for (const id of identifiers)

                await remove_mapping(id, ctx);

            await finalize_transaction(ctx);