How to get the values from a Sales Invoice products table?

[Enitoxy]

Hello,

I've created a custom workflow that reads the values of fields in a Sales Invoice and sends them to a third-party API. So far, I've managed to read values of normal fields using $recordModel->get('subject').

How do I go about reading a products table/advanced block, and adding the products to an array using a loop? Is there maybe an existing function that does this or a variable that contains all of the products?

I've tried reading the Documentation but I couldn't find anything that could solve my problem.