aura_dict_fetch
aura_dict_fetch(d, keys[i], strlen(keys[i]),
aura_dict_fetch(d, "key", strlen("key"), (void **)&v, &len);
void aura_dict_fetch(struct aura_dict *, const void *, size_t,
aura_dict_fetch(d, rk, rk_len, &rv, &rv_len);
aura_dict_fetch(d, k, strlen(k) + 1, &rv, &rv_len);
aura_dict_fetch(cvs->d, rk, rk_len, &rv, &rv_len);
aura_dict_fetch(cvs->d, rk, rk_len, &rv, &rv_len);
aura_dict_fetch(cvs->d, name, strlen(name) + 1, &rv, &rv_len);