527     std::vector<Slice> user_keys;  variable
533       user_keys.emplace_back(keys[i]);
535     status = MultiGet(options, cf, user_keys, &vals);
549     std::vector<Slice> user_keys;  variable
556       user_keys.emplace_back(keys[i]);
558     status = MultiGet(options, cf, user_keys, &vals, &tss);
591     std::vector<Slice> user_keys;  variable
597       user_keys.emplace_back(keys[i]);
599     status = MultiGet(options, cf, user_keys, &vals);
611     std::vector<Slice> user_keys;  variable
618       user_keys.emplace_back(keys[i]);
620     status = MultiGet(options, cf, user_keys, &vals, &tss);