public function getControl() {
        $control = parent::getControl();

        $name = $control->name;
        $id = $control->id;

        $control->name .= '[currency]';
        $control->id .= '-currency';
        $control->value = $this->value['currency'];

        $priceInput = Html::el('input')->name($name.'[amount]')->id($id.'-amount');
        // debug($this->value);
        $priceInput->value = $this->value['amount'];

        return $priceInput . $control;
    }