def shift(self, periods=1, freq=None):
        raise NotImplementedError("Not supported for type %s" %
                                  type(self).__name__)
Ajax request doesn't redirect post-action.
dataset/ETHPy150Open pydata/pandas/pandas/indexes/base.py/Index.shift--crossover with--dataset/ETHPy150Open mozilla/moztrap/tests/view/lists/test_actions.py/ActionsTest.test_ajax_no_redirect