No Object Data in Table When Used with Template

Content

Hi,

I know the title is super vague so I'll explain my scenario here:

(1) I have a SDP which is displaying some data in a table. This SDP has some child objects, from which I would like to show some data. But before doing that, I want to perform some logical operations on it in my JavaScript method. Here's how my SDP looks like:

 

I want to display the PartyName from the shipToCustomer.

(2) To do so, I am using the template to pass the entire shipToCustomer object to my JS function and return only a single value in form of String.