# File lib/graphviz/graphml.rb, line 63
    def graphml( node )
      node.each_element( ) do |child|
        #begin
          send( "graphml_#{child.name}".to_sym, child )
        #rescue NoMethodError => e
        #  raise "ERROR node #{child.name} can be child of graphml"
        #end
      end
    end