'returns a new locator
(:class:`mpl_toolkits.axes_grid.axes_divider.AxesLocator`) for
specified cell.
Parameters
ny, ny1 : int
Integers specifying the row-position of the
cell. When *ny1* is None, a single *ny*-th row is
specified. Otherwise location of rows spanning between *ny*
to *ny1* (but excluding *ny1*-th row) is specified.'

def new_locator(self, ny, ny1=None):

    return AxesLocator(self, 0, ny, None, ny1)
