bt_component_class_source_message_iterator_finalize_method msg_iter_finalize;
bt_component_class_source_message_iterator_next_method msg_iter_next;
bt_component_class_source_message_iterator_seek_ns_from_origin_method msg_iter_seek_ns_from_origin;
bt_component_class_source_message_iterator_finalize_method msg_iter_finalize;
bt_component_class_source_message_iterator_next_method msg_iter_next;
bt_component_class_source_message_iterator_seek_ns_from_origin_method msg_iter_seek_ns_from_origin;