rblist__find
rb_node = rblist__find(&ilist->rblist, (void *)i);
nd = rblist__find(metric_events, &me);
nd = rblist__find(metric_events, &me);
nd = rblist__find(groups, &me);
nd = rblist__find(groups, &me);
struct rb_node *rblist__find(struct rblist *rblist, const void *entry);
struct rb_node *rb_node = rblist__find(&slist->rblist, entry);