- struct bt_clock_class *clock_class = NULL;
- struct bt_trace *trace = NULL;
- struct bt_stream *stream = NULL;
- struct bt_stream_class *stream_class = NULL;
+ const struct bt_clock_class *clock_class = NULL;
+ const struct bt_trace *trace = NULL;
+ const struct bt_stream *stream = NULL;
+ const struct bt_stream_class *stream_class = NULL;