int rate_ctr_init(void *tall_ctx);
struct rate_ctr_group *rate_ctr_get_group_by_name_idx(const char *name, const unsigned int idx);
-struct rate_ctr *rate_ctr_get_by_name(const struct rate_ctr_group *ctrg, const char *name);
+const struct rate_ctr *rate_ctr_get_by_name(const struct rate_ctr_group *ctrg, const char *name);
#endif /* RATE_CTR_H */