In the same way that the Featured Items, New Items, Items on Sale, etc. blocks (and even the product pages, and micro stores) use the function fn_get_products() in fn.catalog.php is there a function in fn.cart.php that sends data to the Cart Content and Products in Cart blocks?
I want to insert a key and value into the $cart_products array that I'll use whenever the products are shown in these blocks. I thought the function would be fn_get_cart_products() but when I did some tests, I don't think they use that function. Could it be fn_calculate_cart_content()?
Editing fn_gather_additional_products_data in fn.catalog.php seems to have an effect but only in the dispatch checkout.cart, I'm not sure if it affects any of the blocks I actually need it in.