NW_Tree                 Fit a Structural Forest Heterogeneous
                        Newsvendor tree
NW_prepare              Prepare data for SFHNV trees and forests
build_random_forest     Fit an SFHNV random forest
predict_cdf_forest      Predict SFHNV random forest conditional CDF
                        values
predict_cdf_tree        Predict conditional CDF values from an SFHNV
                        tree
predict_forest          Predict SFHNV random forest point estimates
predict_tree            Predict SFHNV tree point estimates
