surf_workstation_model->extension.workstation.execute = ws_execute;
surf_workstation_model->extension.workstation.sleep = ws_action_sleep;
surf_workstation_model->extension.workstation.get_state = ws_get_state;
surf_workstation_model->extension.workstation.execute = ws_execute;
surf_workstation_model->extension.workstation.sleep = ws_action_sleep;
surf_workstation_model->extension.workstation.get_state = ws_get_state;