def show(self, req, id, **kwargs):
        raise exc.HTTPNotImplemented()
Handles the 'history' being changed.
dataset/ETHPy150Open nii-cloud/dodai-compute/nova/api/openstack/shared_ip_groups.py/Controller.show--crossover with--dataset/ETHPy150Open enthought/traitsui/traitsui/wx/history_control.py/HistoryControl._history_changed