Hi there,
I would like to add a parent column for the list in my module.
I want to create the following module which shows the list parent in the second column:

At the moment I have the left and right side of the image as that part is a straightforward pivot:
Page = volumes line item.
Rows = Customer-SKU list, where Customer is the parent of Customer-SKU.
Columns = Time dimension.
The second column is the issue. This is the parent of the Customer-SKU list item. I want to add this as the Excel export of this module requires it.
I get that I can create the parent as a line item, but the volumes are also brought in with a line item. I could use these line items as columns but I wont get the same layout as above. I’d instead get:

Any ideas?
Thanks,
Declan