/* bullet graph specs */
private PVPanel createVisualization() {
PVPanel vis = graphWidget.getPVPanel().width(400).height(30)
.margin(20).left(120).top(new JsDoubleFunction() {
public double f(JsArgs args) {
PVMark _this = args.getThis();
return 10 + _this.index() * 60;
}
});