    # File lib/graphviz/family_tree/couple.rb, line 16
          def kids( *z )
            @kids = GraphViz::FamilyTree::Sibling.new( z, @persons )

            return

            if z.size == 1
              @graph.add_edge( @node, z[0].node, "dir" => "none" )
            else
              cluster = @graph.add_graph( "#{@node.id}Kids" )
              cluster["rank"] = "same"

              last = nil
              count = 0
              add = (z.size-1)%2 * z.size/2 + (z.size-1)%2
              link = (z.size/2)+1

              z.each do |person|
                count = count + 1
                if count == add
                  middle = cluster.add_node( "#{@node.id}Kids", "shape" => "point" )
                  @graph.add_edge( @node, middle, "dir" => "none" )
                  unless last.nil?
                    cluster.add_edge( last, middle, "dir" => "none" )
                  end
                  last = middle
                end

                kid = cluster.add_node( "#{person.node.id}Kid", "shape" => "point" )
                @graph.add_edge( kid, person.node, "dir" => "none" )

                if add == 0 and count == link
                  @graph.add_edge( @node, kid, "dir" => "none" )
                end

                unless last.nil?
                  cluster.add_edge( last, kid, "dir" => "none" )
                end
                last = kid
              end
            end
          end