surf_workstation_model->extension.workstation.communicate = communicate;
surf_workstation_model->extension.workstation.get_route = get_route;
surf_workstation_model->extension.workstation.execute_parallel_task =
surf_workstation_model->extension.workstation.communicate = communicate;
surf_workstation_model->extension.workstation.get_route = get_route;
surf_workstation_model->extension.workstation.execute_parallel_task =