world->_on_error= (test_callback_error_fn*)world_on_error;
world->collection_startup= (test_callback_fn*)world_container_startup;
world->collection_shutdown= (test_callback_fn*)world_container_shutdown;
world->_on_error= (test_callback_error_fn*)world_on_error;
world->collection_startup= (test_callback_fn*)world_container_startup;
world->collection_shutdown= (test_callback_fn*)world_container_shutdown;