def autoRangeMethod(self):
        """ The currently selected auto range method.
            If there is no method child CTI, there will be only one method (which will be returned).
        """
        if self.methodCti:
            return self.methodCti.configValue
        else:
            assert len(self._rangeFunctions) == 1, \
                "Assumed only one _rangeFunctions. Got: {}".format(self._rangeFunctions)
            return list(self._rangeFunctions.keys())[0]