Lua Scripting .. how to get the object category

I'm trying to write a function that checks whether or not a group is a static object or not and I'm not sure how to do it.

So far I can get this to work:

local PrimaryGroup = Group.getByName("Objective " .. ScenarioNumber .. " Primary"):getCategory()

But that gets the group category and not the object category. I'm not sure how to get object.getCategory to work :doh:

Anyone done this that can help me out?

Edit: Nevermind, got it.

local StaticGroupTestPrimary = StaticObject.getByName("Objective " .. ScenarioNumber .. " Primary"):getCategory()