This function augments the prediction for an individual prediction (Ipred) model. It retrieves the simulation model from the fit object and evaluates the model variables.
.augPredIpredModel(fit)
The evaluated model variables for the Ipred model.
The function performs the following steps:
- Retrieves the simulation model from the provided `fit` object using `.getSimModel` with `hideIpred` and `tad` set to `FALSE`.
- Evaluates the model variables using `rxModelVars`.