Patch (1 call function) plug-in to Beatrix

Plug-in https://marketplace.1c-bitrix.ru/solutions/elcorso.warehousecsvimport
uses the product ID to import the balances to the warehouse. You need to replace the ID search with an item (in our case artnumber)

The plug-in uses this method to search https://dev.1c-bitrix.ru/api_help/iblock/classes/ciblockelement/getbyid.php
We need to replace it with this https://dev.1c-bitrix.ru/api_help/iblock/classes/ciblockelement/SubQuery.php and to transfer the field of articulation into it.

The ultimate goal is to be able to import to the warehouse residues on the field of goods "artnumber" (artnumber) through csv format: article, quantity, price