+ model->action_state_get = surf_action_state_get;
+ model->action_state_set = surf_action_state_set;
+ model->action_get_start_time = surf_action_get_start_time;
+ model->action_get_finish_time = surf_action_get_finish_time;
+ model->action_data_set = surf_action_data_set;
+
+ model->model_private->modified_set = NULL;
+ model->model_private->action_heap = NULL;
+ model->model_private->update_mechanism = UM_UNDEFINED;
+ model->model_private->selective_update = 0;
+