How to use the fbprophet.make_holidays.make_holidays_df function in fbprophet

Parameters
        ----------
        dates: pd.Series containing timestamps used for computing seasonality.

        Returns
        -------
        dataframe of holiday dates, in holiday dataframe format used in
        initialization.
        """
        all_holidays = pd.DataFrame()
        if self.holidays is not None:
            all_holidays = self.holidays.copy()
        if self.country_holidays is not None:
            year_list = list({x.year for x in dates})
            country_holidays_df = make_holidays_df(
                year_list=year_list, country=self.country_holidays
            )
            all_holidays = pd.concat((all_holidays, country_holidays_df), sort=False)
            all_holidays.reset_index(drop=True, inplace=True)
        # If the model has already been fit with a certain set of holidays,
        # make sure we are using those same ones.
        if self.train_holiday_names is not None:
            # Remove holiday names didn't show up in fit
            index_to_drop = all_holidays.index[
                np.logical_not(
                    all_holidays.holiday.isin(self.train_holiday_names)
                )
            ]
            all_holidays = all_holidays.drop(index_to_drop)
            # Add holiday names in fit but not in predict with ds as NA
            holidays_to_add = pd.DataFrame({