protected void installChartFromJsonIO(final YuiContext Y, final Node p) {
//in this case use get for loading the data from a file left in public folder GWT.getModuleBaseURL()+"testfiles/data1.json"
String uri1 = GWT.getModuleBaseURL()+"testfiles/data1.json";
//create an io object for working that will notify us for some io events...
IOConfig ioConfig = IOConfig.create().
on(IO.EVENT_SUCCESS, new EventCallback<IOEvent>() {
@Override
public void call(final IOEvent e) {
JsArray data = JsonUtils.unsafeEval(e.data().responseText());
ChartBase chart1 = Y.newChart(ChartBaseConfig.create().dataProvider(data).render(p));