Add PK model(s) to be fitted
stat_model(model = c("model_flat", "model_1comp", "model_2comp"), ...)
A character vector: the name(s) of models to be fitted. These should be the names of objects of class `pk_model`. Built-in options are [`model_flat`], [`model_1comp`], and [`model_2comp`]. You may add your own model by using [pk_model()].
Additional arguments not currently in use.