new_PlUpliftEval        A non-S3 "constructor" function that returns a
                        list representing a pylift uplift eval object,
                        PlUpliftEval.  This object contains metrics and
                        can be used to generate plots.
plUpliftEval            A helper for the new_PlUpliftEval function that
                        validates the treatment, outcome, prediction,
                        p, and n_bins arguments.
pl_plot                 A port of pylift's plot function
                        (https://github.com/wayfair/pylift) as of
                        commit:
                        https://github.com/wayfair/pylift/tree/bb69692388b1fe085001c3ba7edf6dd81d888353
                        pylift: Plots the different kinds of
                        percentage-targeted curves.
plot_uplift             Creates an uplift plot of cumulative
                        differential treatment/control outcomes versus
                        model score.  Also provides a selection of
                        metrics: max uplift as pct of total control
                        outcome, optimum users targeted and optimum
                        score targeting range.
plot_uplift_guelman     A direct copy of Leo Guelman's uplift::qini
                        function available in the R uplift package at
                        commit
                        95965272e71c312623c95c439fb0b84f95c185b7:
                        https://github.com/cran/uplift/blob/95965272e71c312623c95c439fb0b84f95c185b7/R/qini.R#L5
