Return a Pandas series of the predicted cumulative density at specific times

        Parameters
        -----------
        times: iterable or float

        Returns
        --------
        pd.Series

def cumulative_density_at_times(self, times, label=None):
        """
        Return a Pandas series of the predicted cumulative density at specific times

        Parameters
        -----------
        times: iterable or float

        Returns
        --------
        pd.Series

        """
        label = coalesce(label, self._label)
        return pd.Series(1 - self.predict(times), index=_to_array(times), name=label)