char *memcached_fetch(memcached_st *ptr,
char *key, size_t *key_length,
size_t *value_length, uint32_t *flags,
memcached_return *error);
char *memcached_fetch(memcached_st *ptr,
char *key, size_t *key_length,
size_t *value_length, uint32_t *flags,
memcached_return *error);