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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 data_to_elem_base(self):
 """Custom system base unconversion function"""

        if not self.n or self._flags['sysbase'] is False:
            return
        self.R = mul(self.R, self.Sn) / self.system.mva
        super(GovernorBase, self).data_to_elem_base()