# File lib/graphviz/attrs.rb, line 43
    def []( xKey )
      if xKey.class == Hash
        xKey.each do |k, v|
          self[k] = v
        end
      else
        if @data.key?( xKey.to_s ) == false
          nil
        end
        @data[xKey.to_s]
      end
    end