526     std::vector<ColumnFamilyHandle*> cf;  variable
532       cf.emplace_back(column_family);
535     status = MultiGet(options, cf, user_keys, &vals);
548     std::vector<ColumnFamilyHandle*> cf;  variable
555       cf.emplace_back(column_family);
558     status = MultiGet(options, cf, user_keys, &vals, &tss);
590     std::vector<ColumnFamilyHandle*> cf;  variable
596       cf.emplace_back(column_families[i]);
599     status = MultiGet(options, cf, user_keys, &vals);
610     std::vector<ColumnFamilyHandle*> cf;  variable
617       cf.emplace_back(column_families[i]);
620     status = MultiGet(options, cf, user_keys, &vals, &tss);