# File temp/Graph/Pie.rb, line 147
      def add_defs defs
        gradient = defs.add_element( "filter", {
          "id"=>"dropshadow",
          "width" => "1.2",
          "height" => "1.2",
        } )
        gradient.add_element( "feGaussianBlur", {
          "stdDeviation" => "4",
          "result" => "blur"
        })
      end