Accessing collections field in product/store in repeater

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Hello,

I want to check whether the current product in my repeater has a certain collection in it’s list of collections as shown below.

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So, for example. The above product is in “R-C Daily Wear” head category and all products in the repeater belong to this cateogry right now. So, I want to check in the repeater’s
"export function repeater_itemReady ( $item , itemData , index )" fucntion that whether this product also contains other categories, for example “R-GC Yellow” & “R-GE Men”.

How do I access this multi reference field inside a repeater to check every item in the repeater whether it contains a certain collection or not, in this list of collections?

Thank You.