How to get the child product's integration id in Configurator Script to be used for SetAttribute("$

Hi,
In a relationship of a product that has multiple identical child items, we need to use SetAttribute method in a configurator script for these child items. For this reason, we have to use the $Int.[<id>] path format as the first argument of SetAttribute method.

e.g. SetAttribute("$Int.[1-12345]", "Attribute", "AttributeValue")

But how to get the integration id in the configurator script?

We have taken into account the following documents:

- How to Use the Feature in ACR502 to Update an Attribute for a Specific Instance in a Customizable Product? (Doc ID 1241304.1)
- Product Configurator Script Method SetAttribute: How To Access A Single Product Instance Amongst Multiple Identical Ones (