Prado\Web\UI\WebControls\TWebControl::getCssClass PHP Method

    public function getCssClass()
    {
        if ($style = $this->getViewState('Style', null)) {
            return $style->getCssClass();
        } else {
            return '';
        }
    }

 /**
  * @return string CSS class for the whole tab control div. Defaults to 'tab-panel'.
  */
 public function getCssClass()
 {
     $cssClass = parent::getCssClass();
     return $cssClass === '' ? 'tab-panel' : $cssClass;
 }