# File gtk/sample/gtk-demo/stock_browser.rb, line 221
    def id_to_const(id)
      const = ''

      s = id.id2name
      if s =~ /^gtk-/
        const += 'Gtk::Stock::'
        s[0,4] = ''
      end

      const += s.upcase.gsub(/-/, '_')

      const
    end