BrightIdeasSoftware.DateTimeClusteringStrategy.GetClusterDisplayLabel C# (CSharp) Метод

        public override string GetClusterDisplayLabel(ICluster cluster) {
            DateTime? dateTime = cluster.ClusterKey as DateTime?; 

            return this.ApplyDisplayFormat(cluster, dateTime.HasValue ? this.DateToString(dateTime.Value) : NULL_LABEL);
        }