public function addChoice(\DOMElement $node)
    {
        if (!$this->multiple && 'radio' !== $this->type) {
            throw new \LogicException(sprintf('Unable to add a choice for "%s" as it is not multiple or is not a radio button.', $this->name));
        }

        $option = $this->buildOptionValue($node);
        $this->options[] = $option;

        if ($node->hasAttribute('checked')) {
            $this->value = $option['value'];
        }
    }