@periodic_task.periodic_task
    def _update_our_parents(self, ctxt):
        self.msg_runner.tell_parents_our_capabilities(ctxt)
        self.msg_runner.tell_parents_our_capacities(ctxt)
Override this method so that it flushes the vtk pipeline if
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/cells/manager.py/CellsManager._update_our_parents--crossover with--dataset/ETHPy150Open enthought/mayavi/mayavi/modules/iso_surface.py/IsoSurface.update_data