check_spec_mode_engine_val
                        Error handling for unknown mode
get_model_env           Working with the modelenv model environment
is_unsupervised_fit     Determine object is has class unsupervised_fit
is_unsupervised_spec    Determine object is has class unsupervised_spec
new_unsupervised_fit    Give object unsupervised fit class
new_unsupervised_spec   Give object unsupervised specification class
set_dependency          Register Dependency for Model
set_encoding            Register Encoding Options for Model
set_fit                 Register Fit method for Model
set_model_arg           Register Argument for Model
set_model_engine        Register Engine for Model
set_model_mode          Register Mode for Model
set_new_model           Register New Model
set_pred                Register Prediction Method for Model
stop_incompatible_mode
                        Error handling for incompatible modes