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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 to_sysbase(self):
 """ Convert model parameters to system base. This function calls the ``data_to_sys_base`` function of the loaded models. Returns ------- None """

        if self.config.base:
            for item in self.devman.devices:
                self.__dict__[item].data_to_sys_base()