Get features in the model
Usage
features(object, recorder, ...)
# S4 method for Trained,Recorder
features(object, recorder, type = c("all", "nonzero"), ...)
# S4 method for Trained,missing
features(object, recorder, ...)
# S4 method for Tuned,Recorder
features(object, recorder, ...)
# S4 method for Tuned,missing
features(object, recorder, ...)