Inserts an empty parameter at index *position*

        :param position: order to insert new parameter to
        :type position: int

def insertRow(self, position):
        """Inserts an empty parameter at index *position*

        :param position: order to insert new parameter to
        :type position: int
        """
        if position == -1:
            position = self.nrows()
        defaultparam = { 'start': 0,
                         'step': 0,
                         'stop': 0,
                         'parameter': '',
                         'selection' : [],
                        }
        self._parameters.insert(position, defaultparam)