How to use the ngboost.distns.distn.Distn function in ngboost

def d_score(self, Y):
                return super().d_score(Y_from_censored(Y))

        class DistWithUncensoredScore(cls):
            scores = [UncensoredScore]

        return DistWithUncensoredScore


class RegressionDistn(Distn):
    def predict(self):  # predictions for regression are typically conditional means
        return self.mean()


class ClassificationDistn(Distn):
    def predict(self):  # returns class assignments
        return np.argmax(self.class_probs(), 1)

DistScore = cls.implementation(Score, cls.censored_scores)

        class UncensoredScore(DistScore, DistScore.__base__):
            def score(self, Y):
                return super().score(Y_from_censored(Y))

            def d_score(self, Y):
                return super().d_score(Y_from_censored(Y))

        class DistWithUncensoredScore(cls):
            scores = [UncensoredScore]

        return DistWithUncensoredScore


class RegressionDistn(Distn):
    def predict(self):  # predictions for regression are typically conditional means
        return self.mean()


class ClassificationDistn(Distn):
    def predict(self):  # returns class assignments
        return np.argmax(self.class_probs(), 1)