Getting ACF repeater data into element render function

I have a repeater with 3 fields.

2 of the fields are mapped to output through a custom element. They work exactly as expected.

I need to inject the 3rd field’s data as a class name in the middle of my render function. I can’t simply use get_field because it’s a repeater.

How can I sneak this data from ACF thru Bricks and into my function?