func AddMulti(c context.Context, item []*Item) error {
	return set(c, item, nil, pb.MemcacheSetRequest_ADD)
}
func AddMulti(c context.Context, item []*Item) error {
	return set(c, item, nil, pb.MemcacheSetRequest_ADD)
}
// AddMulti is a batch version of Add.
// appengine.MultiError may be returned.