upstream_port = bt_component_source_borrow_output_port_by_name(
src_comp, "out");
notif_iter = bt_port_output_notification_iterator_create(graph,
upstream_port = bt_component_source_borrow_output_port_by_name(
src_comp, "out");
notif_iter = bt_port_output_notification_iterator_create(graph,