+ const uint32_t master_server_key,
+ const bool is_group_key_set,
+ const char * const *keys,
+ const size_t *key_length,
+ const size_t number_of_keys,
+ const bool mget_mode);
+
+static memcached_return_t __mget_by_key_real(memcached_st *ptr,
+ const char *group_key,
+ const size_t group_key_length,