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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def save_series(self) -> None: """Save time series data as defined by the actual XML `writer` element. True False 9.0 7.0 """

        hydpy.pub.sequencemanager.open_netcdf_writer(
            flatten=hydpy.pub.options.flattennetcdf,
            isolate=hydpy.pub.options.isolatenetcdf)
        self.prepare_sequencemanager()
        for sequence in self._iterate_sequences():
            sequence.save_ext()
        hydpy.pub.sequencemanager.close_netcdf_writer()