I was able to get the value from an input type=text with code like this: 

`$salad_size = $form->addField('line','salad');`

`$salad_button->js('click')->univ()->ajaxec(
 array(
 $this->api->getDestinationURL(), 
 'generate_salad'=>true,
 'salad_size'=>$salad_size->js()->val(),
 ));`

Now I need to get a value from any out of three radio-buttons. This is the object construction:
`$salad_size = $form->addField('radio','salad_size')->setValueList(array('S'=>'Chica','M'=>'Mediana','L'=>'Grande'));`

I'd like to know which exactly is the method name to use instead of 'val()' (as it looks not to be the right one for radios).

I was unable to get the methods list from the API reference page [here](http://agiletoolkit.org/doc/ref). Any other source of avail methods?

TIA