public IsWidget getViewContent() {
XFlexTable panel = new XFlexTable();
panel.setCellSpacing(20);
XRadioButton radio0 = new XRadioButton("Red", "Red");
XRadioButton radio1 = new XRadioButton("Green", "Green");
XRadioButton radio2 = new XRadioButton("Blue", "Blue");
final XRadioButtonGroup group1 = new XRadioButtonGroup(true);
group1.add(radio0, radio1, radio2);
XRadioButton radioA = new XRadioButton("Red", "Red");
XRadioButton radioB = new XRadioButton("Green", "Green");
XRadioButton radioC = new XRadioButton("Blue", "Blue");
final XRadioButtonGroup group2 = new XRadioButtonGroup(false);
group2.add(radioA, radioB, radioC);
final XLabel label1 = new XLabel("Favorite color", XLabelType.Header);