GetINICBool: Don't get how it works as it's not defined anywhere

[NNS10]

This is related to my effort to figure out why the BeeingFemale addon for Bathing in Skyrim doesn't work. Link here.

 

I think it's related to the MCM options code, but I can't understand a certain function. BeeingFemale has FWUtility script with the following function:

bool function getIniCBool(string Type, string File, string Categorie, string Variable, bool Default=false) global native

However, I don't get how it works. It flags it as a native function but I don't see any documentation for it. There's something for getIniBool, and I assume the CBool is a cast. More importantly, I'm not seeing any documentation with those parameters. And that is the primary thing I'm uncertain about while trying to figure out what the code in the linked post is doing.

 

Trying to work backwards due to lack of comments, but that function is the only thing I'm still uncertain about.