MEMCACHED_CALLBACK_USER_DATA,
MEMCACHED_CALLBACK_CLEANUP_FUNCTION,
MEMCACHED_CALLBACK_CLONE_FUNCTION,
MEMCACHED_CALLBACK_MALLOC_FUNCTION,
MEMCACHED_CALLBACK_REALLOC_FUNCTION,
MEMCACHED_CALLBACK_FREE_FUNCTION,
MEMCACHED_CALLBACK_USER_DATA,
MEMCACHED_CALLBACK_CLEANUP_FUNCTION,
MEMCACHED_CALLBACK_CLONE_FUNCTION,
MEMCACHED_CALLBACK_MALLOC_FUNCTION,
MEMCACHED_CALLBACK_REALLOC_FUNCTION,
MEMCACHED_CALLBACK_FREE_FUNCTION,