public void SDiffStore(string intoSetId, string fromSetId, params string[] withSetIds)
{
var setIdsList = new List<string>(withSetIds);
setIdsList.Insert(0, fromSetId);
setIdsList.Insert(0, intoSetId);
var cmdWithArgs = MergeCommandWithArgs(Commands.SDiffStore, setIdsList.ToArray());
SendExpectSuccess(cmdWithArgs);
}