This function is used to register a mode for a model and mode combination.
set_model_engine(model, mode, eng)NULL invisibly
This function will error if called multiple times with the same arguments. As you should only have one unique model, mode, eng combination.
if (FALSE) {
set_new_model("shallow_learning_model")
set_model_mode("shallow_learning_model", "partition")
get_from_env("shallow_learning_model")
set_model_engine("shallow_learning_model", "partition", "stats")
get_from_env("shallow_learning_model")
}