@check_instance_cell
    def evacuate(self, context, instance, host, *args, **kwargs):
        if host:
            cell_path, host = cells_utils.split_cell_and_item(host)
        self._cast_to_cells(context, instance, 'evacuate',
                host, *args, **kwargs)
Evacuate the given instance with the provided attributes.
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/compute/cells_api.py/ComputeCellsAPI.evacuate