I am trying to find out where the "data" array, specifically the "position" value inside the "data" array gets extracted from a catalogProductLinkAssign Magento SOAP API V2 web service call and subsequently saved inside magento.
The relevant documentation indicating the node I am talking about is here: http://devdocs.magento.com/guides/m1x/api/soap/catalog/catalogProductLink/catalog_product_link.assign.html
You can see reference to a node called catalogProductLinkEntity which contains a array called "data". Inside this array is the string value called "position".
Where in the magento source code tree is this value extracted? The closest I have been able to get is to this file (\app\code\core\Mage\Catalog\Model\Product\Link\Api\V2.php) but can't see where the position value itself is extracted, just a value called code.