def delay(self, delay=None):
        if delay is None:
            return self._delayvalue
        self._delayvalue = int(delay)
Override the transform_non_affine method to implement the custom
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/site-packages/turtle.py/TurtleScreen.delay--crossover with--dataset/ETHPy150Open ejeschke/ginga/ginga/mplw/transform.py/GingaAxes.GingaTransform.transform_non_affine