On what fields indexing is performed for predefined classes?

When we are accessing Groups, Users, etc. by their runtime API (say nk.GroupsList), there are multiple parameters that we can pass. From the performance perspective, are the arguments to the function (langTag, open, groupName, etc.) indexed on the database side of Nakama?

nk.GroupsList(ctx, groupName, langTag, &members, &open, limit, cursor)