Assigns *param* to index *row*, overwritting the
        parameter at that location

        :param row: the ith parameter number
        :type row: int
        :param param: parameter to set
        :type param: dict

def overwriteParam(self, row, param):
        """Assigns *param* to index *row*, overwritting the
        parameter at that location

        :param row: the ith parameter number
        :type row: int
        :param param: parameter to set
        :type param: dict
        """
        if row == -1:
            row = self.nrows() - 1
        self._parameters[row] = param