def _hide_page(self, page):

        page.Show(False)
        self._sizer.Remove(page)

        return
Given the derivative of the objective with respect to the diagonal of
dataset/ETHPy150Open enthought/pyface/pyface/wx/pager.py/Pager._hide_page--crossover with--dataset/ETHPy150Open SheffieldML/GPy/GPy/kern/src/stationary.py/Stationary.update_gradients_diag