Hi @erikmetha, thanks for your query. I assume you are referring to this tutorial @ https://wiki.unrealengine.com/Grappling_Hook_Tutorial ?
This is a part of the Unreal’s own community project and is not code that Tobii oversees.
For an answer to your question, I would recommend you post again on Unity’s own forum where hopefully someone there can point you in the right direction. Best Wishes.