DTR.Boots.KernSmooth    Make inference about the linear treatment
                        regime vector and the optimal value
DTR.KernSmooth          Estimate the optimal treatment regime among all
                        linear regimes with smoothed estimation methods
obj_value               Estimate the average response value of the
                        input data given a treatment regime
predict.DTR.Boots.KernSmooth
                        Predict the optimal treatment given a
                        'DTR.Boots.KernSmooth' object
predict.DTR.KernSmooth
                        Predict the optimal treatments given a
                        'DTR.KernSmooth' object
