RadioButtonGroup, select item

Flow
1

Hello,

how do I select an item in a RadioButtonGroup ?

generosRadioButtons.getElement().getChild(0).setProperty("aria-checked",true);

Not working :S

2 
RadioButtonGroup<String> buttons = new RadioButtonGroup<>();
buttons.setItems("One", "Two", "Three");
buttons.setValue("Two"); // Selects 2nd item
3

woww, XD thnks my lord.