code: @Deprecated
  	public int count() {
  		int count = (clusteringFeature != null) ? 1 : 0;
  		for (ClusteringTreeNode child : children) {
  			count += child.count();
  		}
  		return count;
  	}
docs: Counts the elements in tree with this node as the root.
  
  @deprecated
  @return the number of elements