How to migrate inventory data from an other source document?

Hi community, Hi @victor-v-rad,

I successfully migrated data from magento 1.9.2 to 2.3.5 - but due to a multi ware house extension used in magento source i have to pull inventory data from a different table than 'cataloginventory_stock_item'. The table structure is very similar to the one used in 'cataloginventory_stock_item', plus there is the field 'website_id' in it!

I found two locations in the following files were 'cataloginventory_stock_item' is defined:

src/Migration/Step/Inventory/Delta.php | Line 83
and
src/Migration/Step/Inventory/Model/SourceItem.php | Line 47

Is there a way to tell your migration tool to use my table instead, maybe per xml definition in map.xml or elsewhere... ?

Start with src/Migration/Step/Inventory/Delta.php at line 83 and src/Migration/Step/Inventory/Model/SourceItem.php at line 47, then inspect whether map.xml can configure the source table. Done means determining and documenting a supported way to migrate inventory from the alternate table, including its website_id field.

Written by the indexing model from the issue text.