g_assert((event_hook = *(value.v_pointer)) != NULL);
lttv_hooks_add(event_hook, for_each_event, &a_event_count, LTTV_PRIO_DEFAULT);
g_assert((event_hook = *(value.v_pointer)) != NULL);
lttv_hooks_add(event_hook, for_each_event, &a_event_count, LTTV_PRIO_DEFAULT);