-memcached_return_t memcached_set_by_key(memcached_st *ptr,
- const char *master_key, size_t master_key_length,
- const char *key, size_t key_length,
- const char *value, size_t value_length,
+memcached_return_t memcached_set_by_key(memcached_st *ptr,
+ const char *group_key, size_t group_key_length,
+ const char *key, size_t key_length,
+ const char *value, size_t value_length,