NSOutlineView BOM populated with data from JSON input

I have JSON input that - for this example - can be hard coded into the file as a string. The JSON is attached. This JSON is currently loaded into a class structure with the Swift code also included in the attachment. I'm looking for a quick implementation where this data is populated and shown in an NSOutlineView using the Swift programming language. I expect you will need to write the code for the NSOutlineViewDelegate, NSOutlineViewDataSource protocols. The columns for the outline view should be: Part Number, Description , Quantity, Unit, Cost per unit, and Cost The structure of the JSON input can not be changed at this point. However, if there is a better way to write the Swift classes to work with the NSOutlineView that's fine.