button_yes_no_box
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    public function button_yes_no_box()
    {
        return _class('html')->button_yes_no_box('input_name', ['k1' => 'key1', 'k2' => 'key2']);
    }
    public function button_yes_no_box($name, $values = [], $selected = null)
    {
        $def_cls = $this->CLASS_LABEL_BTN_RADIO;
        $values = [
            ['class' => $def_cls . ' btn-warning', 'html' => '<i class="fa fa-ban"></i> ' . t('No') . '</span>'],
            ['class' => $def_cls . ' btn-success', 'html' => '<i class="fa fa-check"></i> ' . t('Yes') . '</span>'],
        ];
        return $this->button_radio_box($name, $values, $selected);
    }