What exactly are you trying to do? You can unwrap your model the same way you unwrap any other Optional, but I suspect that's not really what you want to know.

Ways to unwrap an Optional:

//using the unwrap operator
let name = descriptionModels?.name

//using the force unwrap operator
let name = descriptionModels!.name

//using if let
if let name = descriptionModels.name {
    //do something with name
}

//using guard let
guard let name = descriptionModels.name else {
    //exit from scope
}
//do something with name

//using the nil coalescing operator
let name = descriptionModels.name ?? "No name"

//and I'm probably forgetting more...