StockSourceLink
Magento\Inventory\Model\ResourceModel\StockSourceLink
What it does
This resource model manages database operations for linking inventory sources to stocks in Magento's Multi-Source Inventory (MSI) system.
Developers use this class when they need to persist, retrieve, or manage the relationships between inventory sources and stock records in the inventory_source_stock_link table.
It provides the database abstraction layer for StockSourceLink model operations.