Why is my CoreML model out of scope in this, and how do I fix it?

Question

Screenshot of my Xcode and the error

I want to use the model like how Apple (https://developer.apple.com/documentation/coreml/integrating_a_core_ml_model_into_your_app) describes in its CoreML documentation, where they state this:

let model = MarsHabitatPicker()

I tried to follow the Apple documentation, but I don't think I understood it, and do not know what to do to resolve this error. I also do not know how to adjust the settings of the model if necessary.