# File lib/graphviz/node.rb, line 71
71:     def <<( oNode )
72:       if( oNode.class == Array ) 
73:         oNode.each do |no|
74:           self << no
75:         end
76:       else
77:         return GraphViz::commonGraph( oNode, self ).add_edge( self, oNode )
78:       end
79:     end