how to gwt value of radio button from ui binder

Lets say I have three radio buttons belonging to a group. Upon some
event,
I would like to retrieve the value of the radio button selected in my
UiBInder class.

One possible approach, I guess, is to declare a ui:field for each of
the
radio buttons(like in the example below) and thus retrieve the
selected
value in the UiBInder class.

<g:RadioButton ui:field="value1" value="value1"
ui:name="rbname">value1</g:RadioButton>
<g:RadioButton ui:field="value2" value="value2"
ui:name="rbname">value2</g:RadioButton>
<g:RadioButton ui:field="value3" value="value3"
ui:name="rbname">value3</g:RadioButton>

Is there any other way to achieve this without having to declare a
ui:filed
for each and every radio button of a group.

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