public function radio($fieldName, $options = [], array $attributes = [])
{
$attributes['options'] = $options;
$attributes['idPrefix'] = $this->_idPrefix;
$attributes = $this->_initInputField($fieldName, $attributes);
$hiddenField = isset($attributes['hiddenField']) ? $attributes['hiddenField'] : true;
unset($attributes['hiddenField']);
$radio = $this->widget('radio', $attributes);
$hidden = '';
if ($hiddenField) {
$hidden = $this->hidden($fieldName, ['value' => '', 'form' => isset($attributes['form']) ? $attributes['form'] : null, 'name' => $attributes['name']]);
}
return $hidden . $radio;
}