public List <SmallGroupPlacemark> LoadGroupsInCluster(String clusterid, String start, String count)
        {
            Google google;


            google = new Google(ArenaContext.Current.User, HttpContext.Current.Request.ApplicationPath);

            return(google.SmallGroupPlacemarksInCluster(Convert.ToInt32(clusterid),
                                                        (String.IsNullOrEmpty(start) ? 0 : Convert.ToInt32(start)),
                                                        (String.IsNullOrEmpty(count) ? Int32.MaxValue : Convert.ToInt32(count))));
        }