code: function add(id, text, title, fn) {
  			if (!buttons[id]) {
  				var button = renderer.text(
  					text,
  					0,
  					0
  				)
  				.css(options.toolbar.itemStyle)
  				.align({
  					align: 'right',
  					x: -marginRight - 20,
  					y: plotTop + 30
  				})
  				.on('click', fn)
  				/*.on('touchstart', function(e) {
  					e.stopPropagation(); // don't fire the container event
  					fn();
  				})*/
  				.attr({
  					align: 'right',
  					zIndex: 20
  				})
  				.add();
  				buttons[id] = button;
  			}
  		}
docs: /*jslint unparam: true /* allow the unused param title until Toolbar rewrite