+ char *
+ memcached_get_by_key(memcached_st *ptr,
+ char *master_key, size_t master_key_length,
+ char *key, size_t key_length,
+ size_t *value_length,
+ uint16_t *flags,
+ memcached_return *error);
+
+ memcached_return
+ memcached_mget_by_key(memcached_st *ptr,
+ char *master_key, size_t master_key_length,
+ char **keys, size_t *key_length,
+ unsigned int number_of_keys);